Chem 163 Section: Team Number: ALE 24. Voltaic Cells and Standard Cell Potentials. (Reference: 21.2 and 21.3 Silberberg 5 th edition)

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Chem 163 Section: Team Number: ALE 24. Voltaic Cells and Standard Cell Potentials. (Reference: 21.2 and 21.3 Silberberg 5 th edition)"

Transcription

1 Name Chem 163 Sectin: Team Number: ALE 24. Vltaic Cells and Standard Cell Ptentials (Reference: 21.2 and 21.3 Silberberg 5 th editin) What des a vltmeter reading tell us? The Mdel: Standard Reductin and Oxidatin Ptentials In general, the uctin f a metal catin in aqueus slutin t the elemental state f the metal can be written as eqn 1. M m+ (aq) + m e - M(s) (1) The uctin half-reactin has a standard uctin ptential, E. (The superscript naught indicates that the cncentratin f metal catins in slutin is 1 M.) The ptential has units f vlts (V). The greater the desire f a metal t becme uced, the mre psitive the metal s uctin ptential is. As with mst reactins, uctin reactins are reversible. The reverse f eqn 1 is written as eqn 2. M(s) M m+ (aq) + m e - (2) Being an xidatin half-reactin, eqn 2 has a standard xidatin ptential, E. x E f eq 2 has the same magnitude but the ppsite sign as E f eqn 1. While it is cnvenient t think f a metal either underging uctin r xidatin, certainly ther species can be uced r xidized. Hydrgen has been chsen t serve as a reference fr all ther species. By definitin, the standard uctin ptential f hydrgen is 0 V. Key Questins 2 H + (aq) + 2 e - H 2 (g) E = 0 V 1. Use the table f standard uctin ptentials in yur textbk t rank the fllwing 3d blck transitin metal catins in rder frm having the lwest ptential t be uced t having the highest ptential t be uced t the elemental state. Cr 3+ Mn 2+ Fe 2+ C 2+ Ni 2+ Cu 2+ Zn 2+ x lwest ptential t be uced < < < < < < highest ptential t be uced 2a. If a piece f zinc metal is placed in an aqueus slutin f nickel(ii), will the reactin shwn as eqn 3 ccur? Ni 2+ (aq) + Zn(s) Ni(s) + Zn 2+ (aq) (3) Explain yur answer. Page 1 f 6

2 2b. If a piece f cpper metal is placed in an aqueus slutin f cbalt(ii), will the reactin shwn as eqn 4 ccur? Explain yur answer. C 2+ (aq) + Cu(s) C(s) + Cu 2+ (aq) (4) 3. Metallic nickel disslves in 1 M hydrchlric acid spntaneusly accrding t eqn 5. But metallic cpper des nt. Ni(s) + 2 HCl(aq) NiCl 2 (aq) + H 2 (g) (5) Cu(s) + 2 HCl(aq) CuCl 2 (aq) + H 2 (g) Use the table f standard uctin ptentials in yur textbk t explain these facts. The Mdel: Vltaic Cells and Standard Cell Ptentials Because electrns can neither be created nr destryed, a uctin cannt ccur withut an accmpanying xidatin. If tw substances which have different uctin ptentials are cnnected t each ther (via an electrically-cnducting wire), then electrns can flw frm the material which is underging xidatin t the secnd material. When this secnd material accepts the electrns, uctin will ccur. Cnsider the vltaic that is cnstructed by cnnecting the standard hydrgen electrde ( SHE ) t a secnd half- cnsisting f an aluminum electrde submerged in a 1 M Al 3+ (aq) slutin. A schematic f the Al-H + is shwn t the right. The tw slutins are cnnected by a salt bridge (e.g., an agar suspensin f ptassium nitrate, in which the ins are free t flw). The tw electrdes are cnnected by a wire. Between the tw electrdes may be placed a vltmeter. If the tw electrdes are perating at their standard states, then the vltmeter wuld read 1.66 V. Key Questins Al(s) 1 M Al 3+ (aq) 4a. Which species, aluminum r hydrgen, has the greater ptential t be uced? (Circle yur answer.) V KNO 3 salt bridge Pt(s) wire 1 atm H 2 (g) 1 M H + (aq) Page 2 f 6

3 4b. Which f the fllwing reactins ccur in the tw half-s f the Al-H +? (Circle yur answer.) half- n left half- n right i. Al 3+ (aq) + 3 e - Al(s) & 2 H + (aq) + 2 e - H 2 (g) ii. Al 3+ (aq) + 3 e - Al(s) & H 2 (g) 2 H + (aq) + 2 e - iii. Al(s) Al 3+ (aq) + 3 e - & 2 H + (aq) + 2 e - H 2 (g) iv. Al(s) Al 3+ (aq) + 3 e - & H 2 (g) 2 H + (aq) + 2 e - 5a. When the xidatin half-reactin and the uctin half-reactin ccur simultaneusly, by what number must yu multiply the xidatin reactin? By what number must yu multiply the uctin reactin s that the number f electrns is cnserved? b. Write the verall balanced reactin that ccurs in the Al-H +. 6a. What is the standard xidatin ptential (in V) f the species that is xidized in the Al-H +? b. What is the standard uctin ptential (in V) f the species that is uced? c. What is the sum f the standard xidatin ptential f the xidized species [the answer t part (a)] and the standard uctin ptential f the uced species [the answer t part (b)]? (Refer back t the Mdel t see what the vltmeter reads when cnnected t the Al-H +.) d. True OR False: When determining the standard ptential, befre yu add the standard xidatin and uctin ptentials tgether, yu need t multiply E x by the same number that yu multiplied the xidatin half-reactin and yu need t multiply E by the same number that yu multiplied the uctin half-reactin. (Circle yur answer.) 7. The slutin that the aluminum electrde is submerged in is labeled Al 3+ (aq), but there must be sme anin (e.g., nitrate) in slutin s that it is electrically neutral. The same is true f the slutin that is labeled H + (aq). When xidatin ccurs at the surface f the aluminum electrde, Al 3+ ges int slutin. When uctin ccurs at the surface f the platinum electrde, H + leaves the slutin (as hydrgen gas). a. The ptassium catins flw frm the salt bridge int what half-? The nitrate anins flw frm the salt bridge int what half-? K + flws t: NO 3 - flws t: b. The electrde t which catins flw is called the cathde. Smething that can help yu t remember that the uctin half-reactin ccurs at the cathde is that bth wrds begin with a cnsnant. By analgy, why is the secnd electrde called the ande? What d the wrds ande and xidatin have in cmmn that might help yu remember which type f halfreactin ccurs at the ande? Page 3 f 6

4 7c. D electrns flw frm the ande t the cathde r frm the cathde t the ande thrugh the wire? (Circle yur answer.) 8. A schematic drawing f the H 2 -Ag + is shwn t the right. wire 1 atm H 2 (g) KNO 3 salt bridge Ag(s) Pt(s) 1 M H + (aq) 1 M Ag + (aq) a. Having t draw a schematic like the abve every time yu want t infrm a reader f what yu re cnsidering is tedius. Instead, we can use a shrthand ntatin called a diagram. The diagram starts ff with the ande written n the left. As yu cntinue t write the diagram, yu write additinal species in the rder in which they d be encunte in the slutins in ging frm the ande t the cathde. The symbl is used t indicate mving frm ne phase t anther and the symbl is used t indicate the salt bridge. The diagram fr the Al-H 2 (See the Mdel.) in the standard state is: Al(s) Al 3+ (aq, 1 M) H + (aq, 1 M) H 2 (g) Pt(s) Write the diagram fr the H 2 -Ag +. b. Write the half-reactins that ccur at the ande and at the cathde, and write the balanced reactin (WITH NO LEFT OVER ELECTRONS!) that ccurs in the H 2 -Ag +. Half-reactin at the ande: Half-reactin at the cathde: Balanced reactin: c. What are the values f E f the species that is xidized, E f the species that is uced, and E f the H 2 -Ag + x? E E E x 9. The diagram f the Al-Ag + in its standard state is: Al(s) Al 3+ (aq, 1 M) Ag + (aq, 1 M) Ag(s) a. Write the balanced net reactin that ccurs in the Al-Ag +. b. What is the value f E f the Al-Ag +? E Page 4 f 6

5 10. Indicate belw if the statement is true r false. If false, crrect the statement t make it true. a.) T r F In a vltaic, the ande is negative relative t the cathde. b.) T r F Oxidatin ccurs at the ande in bth vltaic s and electrlytic s. c.) T r F Electrns flw int the cathde f an electrlytic. d.) T r F In a vltaic, the surrundings d the wrk n the system. e.) T r F If a metal is plated ut f an electrlytic, it appears n the cathde. f.) T r F The electrlyte prvides a slutin f mbile electrns. 11. Cnsider the vltaic belw. a.) In which directin d electrns flw in the external circuit? b.) In which half- des uctin ccur? c.) In which half- d the electrns leave the? d.) At which electrde are the electrns generated? e.) Which electrde is psitively charged? f.) Which electrde increases in mass? h.) Suggest a pair f ins fr the salt bridge. i.) Fr which electrde culd yu use an inactive metal? j.) In which directin d catins within the salt bridge mve t maintain charge neutrality? g.) Suggest a slutin fr the ande electrlyte 12. Write the balanced half-reactins and the verall spntaneus reactin fr the vltaic in the previus questin. Page 5 f 6

6 13. In acidic slutin, zne and the manganese (II) in react spntaneusly: O 3 (g) Mn (aq) H 2 O(l) O 2 (g) MnO 2 (s) 2H (aq) E = 0.84 V a.) Write the balanced uctin half-reactin. Hint: use xidatin numbers t determine what is xidized and what is uced and then use Appendix D in yur text t find the balanced xidatin and uctin half-reactins. b.) Write the balanced xidatin half-reactin. (See the hint in part a!) c.) Using Appendix D in yur textbk t find E zne, and then calculate E manganese. 14. When a clean irn nail is placed in an aqueus slutin f cpper (II) sulfate, the nail immediately begins t turn a brwn-black clr. In a few minutes, the nail is cmpletely cve with a material f this clr. a.) What is the material cating the nail? Explain. b.) What is the xidizing agent? What is the ucing agent? c.) Can this reactin be made int a vltaic? Explain. d.) Write the balanced equatin fr the reactin. e.) Calculate E fr the prcess. Page 6 f 6

Chapter 19. Electrochemistry. Dr. Al Saadi. Electrochemistry

Chapter 19. Electrochemistry. Dr. Al Saadi. Electrochemistry Chapter 19 lectrchemistry Part I Dr. Al Saadi 1 lectrchemistry What is electrchemistry? It is a branch f chemistry that studies chemical reactins called redx reactins which invlve electrn transfer. 19.1

More information

Electrochemistry. Reduction: the gaining of electrons. Reducing agent (reductant): species that donates electrons to reduce another reagent.

Electrochemistry. Reduction: the gaining of electrons. Reducing agent (reductant): species that donates electrons to reduce another reagent. Electrchemistry Review: Reductin: the gaining f electrns Oxidatin: the lss f electrns Reducing agent (reductant): species that dnates electrns t reduce anther reagent. Oxidizing agent (xidant): species

More information

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site. Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring

More information

Chemistry 132 NT. Electrochemistry. Review

Chemistry 132 NT. Electrochemistry. Review Chemistry 132 NT If yu g flying back thrugh time, and yu see smebdy else flying frward int the future, it s prbably best t avid eye cntact. Jack Handey 1 Chem 132 NT Electrchemistry Mdule 3 Vltaic Cells

More information

CHAPTER 21 ELECTROCHEMISTRY: CHEMICAL CHANGE AND ELECTRICAL WORK

CHAPTER 21 ELECTROCHEMISTRY: CHEMICAL CHANGE AND ELECTRICAL WORK CHAPTR 1 LCTROCHMISTRY: CHMICAL CHANG AND LCTRICAL WORK 1.1 Oxidatin is the lss f electrns (resulting in a higher xidatin number), while reductin is the gain f electrns (resulting in a lwer xidatin number).

More information

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site. Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring

More information

Chapter 8 Reduction and oxidation

Chapter 8 Reduction and oxidation Chapter 8 Reductin and xidatin Redx reactins and xidatin states Reductin ptentials and Gibbs energy Nernst equatin Disprprtinatin Ptential diagrams Frst-Ebswrth diagrams Ellingham diagrams Oxidatin refers

More information

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site. Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring

More information

Electrochemistry. Half-Reactions 1. Balancing Oxidation Reduction Reactions in Acidic and Basic Solutions

Electrochemistry. Half-Reactions 1. Balancing Oxidation Reduction Reactions in Acidic and Basic Solutions Electrchemistry Half-Reactins 1. Balancing Oxidatin Reductin Reactins in Acidic and Basic Slutins Vltaic Cells 2. Cnstructin f Vltaic Cells 3. Ntatin fr Vltaic Cells 4. Cell Ptential 5. Standard Cell Ptentials

More information

2-July-2016 Chemsheets A Page 1

2-July-2016 Chemsheets A Page 1 www.chemsheets.c.uk 2-July-2016 Chemsheets A2 1076 Page 1 SECTION 1 AS REDOX REVISION 1) Oxidatin states When using xidatin states, we effectively imagine everything t be an in the xidatin state is the

More information

Electrochemistry. Learning Objectives. Half-Reactions 1. Balancing Oxidation Reduction Reactions in Acidic and Basic Solutions

Electrochemistry. Learning Objectives. Half-Reactions 1. Balancing Oxidation Reduction Reactions in Acidic and Basic Solutions Electrchemistry 1 Learning Objectives Electrchemistry Balancing Oxidatin Reductin Reactins in Acidic and Basic Slutins a. Learn the steps fr balancing xidatin reductin reactins using the half-reactin methd.

More information

In the half reaction I 2 2 I the iodine is (a) reduced (b) oxidized (c) neither of the above

In the half reaction I 2 2 I the iodine is (a) reduced (b) oxidized (c) neither of the above 6.3-110 In the half reactin I 2 2 I the idine is (a) reduced (b) xidized (c) neither f the abve 6.3-120 Vitamin C is an "antixidant". This is because it (a) xidizes readily (b) is an xidizing agent (c)

More information

2004 AP CHEMISTRY FREE-RESPONSE QUESTIONS

2004 AP CHEMISTRY FREE-RESPONSE QUESTIONS 2004 AP CHEMISTRY FREE-RESPONSE QUESTIONS 6. An electrchemical cell is cnstructed with an pen switch, as shwn in the diagram abve. A strip f Sn and a strip f an unknwn metal, X, are used as electrdes.

More information

University Chemistry Quiz /04/21 1. (10%) Consider the oxidation of ammonia:

University Chemistry Quiz /04/21 1. (10%) Consider the oxidation of ammonia: University Chemistry Quiz 3 2015/04/21 1. (10%) Cnsider the xidatin f ammnia: 4NH 3 (g) + 3O 2 (g) 2N 2 (g) + 6H 2 O(l) (a) Calculate the ΔG fr the reactin. (b) If this reactin were used in a fuel cell,

More information

Making and Experimenting with Voltaic Cells. I. Basic Concepts and Definitions (some ideas discussed in class are omitted here)

Making and Experimenting with Voltaic Cells. I. Basic Concepts and Definitions (some ideas discussed in class are omitted here) Making xperimenting with Vltaic Cells I. Basic Cncepts Definitins (sme ideas discussed in class are mitted here) A. Directin f electrn flw psitiveness f electrdes. If ne electrde is mre psitive than anther,

More information

CHEM 2400/2480. Lecture 19

CHEM 2400/2480. Lecture 19 Lecture 19 Metal In Indicatr - a cmpund whse clur changes when it binds t a metal in - t be useful, it must bind the metal less strngly than EDTA e.g. titratin f Mg 2+ with EDTA using erichrme black T

More information

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site. Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring

More information

Electrochemical Reactions

Electrochemical Reactions Electrchemical Reactins The first chemical prcess t prduce electricity was described in 1800 by the Italian scientist Alessandr Vlta, a frmer high schl teacher. Acting n the hypthesis that tw dissimilar

More information

ALE 21. Gibbs Free Energy. At what temperature does the spontaneity of a reaction change?

ALE 21. Gibbs Free Energy. At what temperature does the spontaneity of a reaction change? Name Chem 163 Sectin: Team Number: ALE 21. Gibbs Free Energy (Reference: 20.3 Silberberg 5 th editin) At what temperature des the spntaneity f a reactin change? The Mdel: The Definitin f Free Energy S

More information

Lecture 13: Electrochemical Equilibria

Lecture 13: Electrochemical Equilibria 3.012 Fundamentals f Materials Science Fall 2005 Lecture 13: 10.21.05 Electrchemical Equilibria Tday: LAST TIME...2 An example calculatin...3 THE ELECTROCHEMICAL POTENTIAL...4 Electrstatic energy cntributins

More information

Chem 112, Fall 05 (Weis/Garman) Exam 4A, December 14, 2005 (Print Clearly) +2 points

Chem 112, Fall 05 (Weis/Garman) Exam 4A, December 14, 2005 (Print Clearly) +2 points +2 pints Befre yu begin, make sure that yur exam has all 7 pages. There are 14 required prblems (7 pints each) and tw extra credit prblems (5 pints each). Stay fcused, stay calm. Wrk steadily thrugh yur

More information

CHEM Thermodynamics. Change in Gibbs Free Energy, G. Review. Gibbs Free Energy, G. Review

CHEM Thermodynamics. Change in Gibbs Free Energy, G. Review. Gibbs Free Energy, G. Review Review Accrding t the nd law f Thermdynamics, a prcess is spntaneus if S universe = S system + S surrundings > 0 Even thugh S system

More information

CHEM Thermodynamics. Change in Gibbs Free Energy, G. Review. Gibbs Free Energy, G. Review

CHEM Thermodynamics. Change in Gibbs Free Energy, G. Review. Gibbs Free Energy, G. Review Review Accrding t the 2 nd law f Thermdynamics, a prcess is spntaneus if S universe = S system + S surrundings > 0 Even thugh S system

More information

Chapter 9 Chemical Reactions NOTES

Chapter 9 Chemical Reactions NOTES Chapter 9 Chemical Reactins NOTES Chemical Reactins Chemical reactin: Chemical change 4 Indicatrs f Chemical Change: (1) (2) (3) (4) Cnsist f reactants (starting materials) and prducts (substances frmed)

More information

Strategy Write the two half-cell reactions and identify the oxidation and reduction reactions. Pt H2 (g) H + (aq)

Strategy Write the two half-cell reactions and identify the oxidation and reduction reactions. Pt H2 (g) H + (aq) Slutins manual fr Burrws et.al. Chemistry 3 Third editin 16 Electrchemistry Answers t wrked examples WE 16.1 Drawing a cell diagram (n p. 739 in Chemistry 3 ) Draw a cell diagram fr an electrchemical cell

More information

CHEM 1032 FALL 2017 Practice Exam 4 1. Which of the following reactions is spontaneous under normal and standard conditions?

CHEM 1032 FALL 2017 Practice Exam 4 1. Which of the following reactions is spontaneous under normal and standard conditions? 1 CHEM 1032 FALL 2017 Practice Exam 4 1. Which f the fllwing reactins is spntaneus under nrmal and standard cnditins? A. 2 NaCl(aq) 2 Na(s) + Cl2(g) B. CaBr2(aq) + 2 H2O(aq) Ca(OH)2(aq) + 2 HBr(aq) C.

More information

How can standard heats of formation be used to calculate the heat of a reaction?

How can standard heats of formation be used to calculate the heat of a reaction? Name Chem 161, Sectin: Grup Number: ALE 28. Hess s Law and Standard Enthalpies Frmatin (Reerence: Chapter 6 - Silberberg 5 th editin) Imprtant!! Fr answers that invlve a calculatin yu must shw yur wrk

More information

How can standard heats of formation be used to calculate the heat of a reaction?

How can standard heats of formation be used to calculate the heat of a reaction? Answer Key ALE 28. ess s Law and Standard Enthalpies Frmatin (Reerence: Chapter 6 - Silberberg 4 th editin) Imprtant!! Fr answers that invlve a calculatin yu must shw yur wrk neatly using dimensinal analysis

More information

CHEM 116 Electrochemistry at Non-Standard Conditions, and Intro to Thermodynamics

CHEM 116 Electrochemistry at Non-Standard Conditions, and Intro to Thermodynamics CHEM 116 Electrchemistry at Nn-Standard Cnditins, and Intr t Thermdynamics Imprtant annuncement: If yu brrwed a clicker frm me this semester, return it t me at the end f next lecture r at the final exam

More information

Differentiation Applications 1: Related Rates

Differentiation Applications 1: Related Rates Differentiatin Applicatins 1: Related Rates 151 Differentiatin Applicatins 1: Related Rates Mdel 1: Sliding Ladder 10 ladder y 10 ladder 10 ladder A 10 ft ladder is leaning against a wall when the bttm

More information

CHAPTER 6 / HARVEY A. CHEMICAL EQUILIBRIUM B. THERMODYNAMICS AND EQUILIBRIUM C. MANUPULATING EQUILIBRIUM CONSTANTS

CHAPTER 6 / HARVEY A. CHEMICAL EQUILIBRIUM B. THERMODYNAMICS AND EQUILIBRIUM C. MANUPULATING EQUILIBRIUM CONSTANTS CHPTER 6 / HRVEY. CHEMICL B. THERMODYNMICS ND C. MNUPULTING CONSTNTS D. CONSTNTS FOR CHEMICL RECTIONS 1. Precipitatin Reactins 2. cid-base Reactins 3. Cmplexatin Reactins 4. Oxidatin-Reductin Reactins

More information

Thermodynamics Partial Outline of Topics

Thermodynamics Partial Outline of Topics Thermdynamics Partial Outline f Tpics I. The secnd law f thermdynamics addresses the issue f spntaneity and invlves a functin called entrpy (S): If a prcess is spntaneus, then Suniverse > 0 (2 nd Law!)

More information

CHM 152 Practice Final

CHM 152 Practice Final CM 152 Practice Final 1. Of the fllwing, the ne that wuld have the greatest entrpy (if cmpared at the same temperature) is, [a] 2 O (s) [b] 2 O (l) [c] 2 O (g) [d] All wuld have the same entrpy at the

More information

**DO NOT ONLY RELY ON THIS STUDY GUIDE!!!**

**DO NOT ONLY RELY ON THIS STUDY GUIDE!!!** Tpics lists: UV-Vis Absrbance Spectrscpy Lab & ChemActivity 3-6 (nly thrugh 4) I. UV-Vis Absrbance Spectrscpy Lab Beer s law Relates cncentratin f a chemical species in a slutin and the absrbance f that

More information

Name: Period: Date: ATOMIC STRUCTURE NOTES ADVANCED CHEMISTRY

Name: Period: Date: ATOMIC STRUCTURE NOTES ADVANCED CHEMISTRY Name: Perid: Date: ATOMIC STRUCTURE NOTES ADVANCED CHEMISTRY Directins: This packet will serve as yur ntes fr this chapter. Fllw alng with the PwerPint presentatin and fill in the missing infrmatin. Imprtant

More information

Regents Chemistry Period Unit 3: Atomic Structure. Unit 3 Vocabulary..Due: Test Day

Regents Chemistry Period Unit 3: Atomic Structure. Unit 3 Vocabulary..Due: Test Day Name Skills: 1. Interpreting Mdels f the Atm 2. Determining the number f subatmic particles 3. Determine P, e-, n fr ins 4. Distinguish istpes frm ther atms/ins Regents Chemistry Perid Unit 3: Atmic Structure

More information

BIT Chapters = =

BIT Chapters = = BIT Chapters 17-0 1. K w = [H + ][OH ] = 9.5 10 14 [H + ] = [OH ] =.1 10 7 ph = 6.51 The slutin is neither acidic nr basic because the cncentratin f the hydrnium in equals the cncentratin f the hydride

More information

Acids and Bases Lesson 3

Acids and Bases Lesson 3 Acids and Bases Lessn 3 The ph f a slutin is defined as the negative lgarithm, t the base ten, f the hydrnium in cncentratin. In a neutral slutin at 25 C, the hydrnium in and the hydrxide in cncentratins

More information

NUPOC STUDY GUIDE ANSWER KEY. Navy Recruiting Command

NUPOC STUDY GUIDE ANSWER KEY. Navy Recruiting Command NUPOC SUDY GUIDE ANSWER KEY Navy Recruiting Cmmand CHEMISRY. ph represents the cncentratin f H ins in a slutin, [H ]. ph is a lg scale base and equal t lg[h ]. A ph f 7 is a neutral slutin. PH < 7 is acidic

More information

making triangle (ie same reference angle) ). This is a standard form that will allow us all to have the X= y=

making triangle (ie same reference angle) ). This is a standard form that will allow us all to have the X= y= Intrductin t Vectrs I 21 Intrductin t Vectrs I 22 I. Determine the hrizntal and vertical cmpnents f the resultant vectr by cunting n the grid. X= y= J. Draw a mangle with hrizntal and vertical cmpnents

More information

Midterm Review Notes - Unit 1 Intro

Midterm Review Notes - Unit 1 Intro Midterm Review Ntes - Unit 1 Intr 3 States f Matter Slid definite shape, definite vlume, very little mlecular mvement Liquid definite vlume, takes shape f cntainer, mlecules mve faster Gas des nt have

More information

19 Applications of Standard Electrode Potentials

19 Applications of Standard Electrode Potentials 9 Applicatins f Standard lectrde Ptentials ( Calculating thermdynamic cell ptentials ( Calculating equilibrium cnstants fr redx reactins ( Cnstructing redx titratin curves 9A Calculating Ptentials f lectrchemical

More information

CHAPTER Read Chapter 17, sections 1,2,3. End of Chapter problems: 25

CHAPTER Read Chapter 17, sections 1,2,3. End of Chapter problems: 25 CHAPTER 17 1. Read Chapter 17, sectins 1,2,3. End f Chapter prblems: 25 2. Suppse yu are playing a game that uses tw dice. If yu cunt the dts n the dice, yu culd have anywhere frm 2 t 12. The ways f prducing

More information

Interference is when two (or more) sets of waves meet and combine to produce a new pattern.

Interference is when two (or more) sets of waves meet and combine to produce a new pattern. Interference Interference is when tw (r mre) sets f waves meet and cmbine t prduce a new pattern. This pattern can vary depending n the riginal wave directin, wavelength, amplitude, etc. The tw mst extreme

More information

CHE 105 EXAMINATION III November 11, 2010

CHE 105 EXAMINATION III November 11, 2010 CHE 105 EXAMINATION III Nvember 11, 2010 University f Kentucky Department f Chemistry READ THESE DIRECTIONS CAREFULLY BEFORE STARTING THE EXAMINATION! It is extremely imprtant that yu fill in the answer

More information

Unit 14 Thermochemistry Notes

Unit 14 Thermochemistry Notes Name KEY Perid CRHS Academic Chemistry Unit 14 Thermchemistry Ntes Quiz Date Exam Date Lab Dates Ntes, Hmewrk, Exam Reviews and Their KEYS lcated n CRHS Academic Chemistry Website: https://cincchem.pbwrks.cm

More information

Ch 18 Electrochemistry 電化學

Ch 18 Electrochemistry 電化學 Ch 18 Electrchemistry 電化學 Electrchemistry is the study f the intercnversin f electrical and chemical energy. This cnversin takes place in an electrchemical cell. 1. Vltaic cell. ( 伏打電池 ). Electrlytic cell.

More information

Examples: 1. How much heat is given off by a 50.0 g sample of copper when it cools from 80.0 to 50.0 C?

Examples: 1. How much heat is given off by a 50.0 g sample of copper when it cools from 80.0 to 50.0 C? NOTES: Thermchemistry Part 1 - Heat HEAT- TEMPERATURE - Thermchemistry: the study f energy (in the frm f heat) changes that accmpany physical & chemical changes heat flws frm high t lw (ht cl) endthermic

More information

Downloaded from

Downloaded from ELECTROCHEMISTRY ONE Mark Each 1. The difference between the electrde ptentials f tw electrdes when n current is drawn thrugh the cell is called.. Under what cnditin an electrchemical cell can behave like

More information

Nuggets of Knowledge for Chapter 8 Chemical Reactions II Chem 2310

Nuggets of Knowledge for Chapter 8 Chemical Reactions II Chem 2310 Nuggets f Knwledge fr Chapter 8 Chemical Reactins II Chem 2310 I. Substitutin, Additin, and Eliminatin Reactins The terms dissciatin, assciatin, and displacement are useful fr describing what happens t

More information

Edexcel GCSE Physics

Edexcel GCSE Physics Edexcel GCSE Physics Tpic 10: Electricity and circuits Ntes (Cntent in bld is fr Higher Tier nly) www.pmt.educatin The Structure f the Atm Psitively charged nucleus surrunded by negatively charged electrns

More information

What factors influence how far a reaction goes and how fast it gets there?

What factors influence how far a reaction goes and how fast it gets there? . What s in a slutin? Hw far des a reactin g? 2. What factrs influence hw far a reactin ges and hw fast it gets there? 3. Hw d atmic and mlecular structure influence bserved prperties f substances? Big

More information

Unit 11 Solutions- Guided Notes. What are alloys? What is the difference between heterogeneous and homogeneous mixtures?

Unit 11 Solutions- Guided Notes. What are alloys? What is the difference between heterogeneous and homogeneous mixtures? Name: Perid: Unit 11 Slutins- Guided Ntes Mixtures: What is a mixture and give examples? What is a pure substance? What are allys? What is the difference between hetergeneus and hmgeneus mixtures? Slutins:

More information

1.0 Fundamentals. Fig Schematic diagram of an electrochemical cell.

1.0 Fundamentals. Fig Schematic diagram of an electrochemical cell. 1 1.0 Fundamentals This chapter intrduces the electrchemical cell, its cmpnents, basic definitins, and the prcesses that take place during electrlysis. The difference between thermdynamics and kinetics

More information

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site. Find this material useful? Yu can help ur team t eep this site up and bring yu even mre cntent cnsider dnating via the lin n ur site. Still having truble understanding the material? Chec ut ur Tutring

More information

Part One: Heat Changes and Thermochemistry. This aspect of Thermodynamics was dealt with in Chapter 6. (Review)

Part One: Heat Changes and Thermochemistry. This aspect of Thermodynamics was dealt with in Chapter 6. (Review) CHAPTER 18: THERMODYNAMICS AND EQUILIBRIUM Part One: Heat Changes and Thermchemistry This aspect f Thermdynamics was dealt with in Chapter 6. (Review) A. Statement f First Law. (Sectin 18.1) 1. U ttal

More information

A Chemical Reaction occurs when the of a substance changes.

A Chemical Reaction occurs when the of a substance changes. Perid: Unit 8 Chemical Reactin- Guided Ntes Chemical Reactins A Chemical Reactin ccurs when the f a substance changes. Chemical Reactin: ne r mre substances are changed int ne r mre new substances by the

More information

AP CHEMISTRY CHAPTER 6 NOTES THERMOCHEMISTRY

AP CHEMISTRY CHAPTER 6 NOTES THERMOCHEMISTRY AP CHEMISTRY CHAPTER 6 NOTES THERMOCHEMISTRY Energy- the capacity t d wrk r t prduce heat 1 st Law f Thermdynamics: Law f Cnservatin f Energy- energy can be cnverted frm ne frm t anther but it can be neither

More information

CHEMISTRY 16 HOUR EXAM IV KEY April 23, 1998 Dr. Finklea. 1. The anti-cancer drug cis-platin is the complex: cis-[pt(nh ) (Cl) ]. In this complex, the

CHEMISTRY 16 HOUR EXAM IV KEY April 23, 1998 Dr. Finklea. 1. The anti-cancer drug cis-platin is the complex: cis-[pt(nh ) (Cl) ]. In this complex, the CHEMISTRY 16 HOUR EXAM IV KEY April 23, 1998 Dr. Finklea Sme useful cnstants: ln(10) = 2.303, R = 8.314 J/ml@K, F = 96,00 cul/ml, 2.303RT/F = 0.0916 V at 2EC. Assume a temperature f 2EC unless tld therwise.

More information

Three Definitions of Acids/Bases Type Acid Base Problems with it Arrhenius Bronsted-Lowry Lewis. NH 3(aq) + H 2O(l)

Three Definitions of Acids/Bases Type Acid Base Problems with it Arrhenius Bronsted-Lowry Lewis. NH 3(aq) + H 2O(l) CP NT Ch 19: Acid and Bases An Intrductin Prperties f Acids 1. taste 2. Can prduce H + ( ) ins ( ) 3. Change the clr f litmus frm t 4. Reacts with such as Zn and Mg t prduce gas. Ba(s) + H 2SO 4 BaSO 4(aq)

More information

SPH3U1 Lesson 06 Kinematics

SPH3U1 Lesson 06 Kinematics PROJECTILE MOTION LEARNING GOALS Students will: Describe the mtin f an bject thrwn at arbitrary angles thrugh the air. Describe the hrizntal and vertical mtins f a prjectile. Slve prjectile mtin prblems.

More information

Supporting information

Supporting information Electrnic Supplementary Material (ESI) fr Physical Chemistry Chemical Physics This jurnal is The wner Scieties 01 ydrgen perxide electrchemistry n platinum: twards understanding the xygen reductin reactin

More information

Three charges, all with a charge of 10 C are situated as shown (each grid line is separated by 1 meter).

Three charges, all with a charge of 10 C are situated as shown (each grid line is separated by 1 meter). Three charges, all with a charge f 0 are situated as shwn (each grid line is separated by meter). ) What is the net wrk needed t assemble this charge distributin? a) +0.5 J b) +0.8 J c) 0 J d) -0.8 J e)

More information

11. DUAL NATURE OF RADIATION AND MATTER

11. DUAL NATURE OF RADIATION AND MATTER 11. DUAL NATURE OF RADIATION AND MATTER Very shrt answer and shrt answer questins 1. Define wrk functin f a metal? The minimum energy required fr an electrn t escape frm the metal surface is called the

More information

Pipetting 101 Developed by BSU CityLab

Pipetting 101 Developed by BSU CityLab Discver the Micrbes Within: The Wlbachia Prject Pipetting 101 Develped by BSU CityLab Clr Cmparisns Pipetting Exercise #1 STUDENT OBJECTIVES Students will be able t: Chse the crrect size micrpipette fr

More information

Chapter 17 Free Energy and Thermodynamics

Chapter 17 Free Energy and Thermodynamics Chemistry: A Mlecular Apprach, 1 st Ed. Nivald Tr Chapter 17 Free Energy and Thermdynamics Ry Kennedy Massachusetts Bay Cmmunity Cllege Wellesley Hills, MA 2008, Prentice Hall First Law f Thermdynamics

More information

Thermodynamics and Equilibrium

Thermodynamics and Equilibrium Thermdynamics and Equilibrium Thermdynamics Thermdynamics is the study f the relatinship between heat and ther frms f energy in a chemical r physical prcess. We intrduced the thermdynamic prperty f enthalpy,

More information

Dispersion Ref Feynman Vol-I, Ch-31

Dispersion Ref Feynman Vol-I, Ch-31 Dispersin Ref Feynman Vl-I, Ch-31 n () = 1 + q N q /m 2 2 2 0 i ( b/m) We have learned that the index f refractin is nt just a simple number, but a quantity that varies with the frequency f the light.

More information

Unit 13 Acids and Bases. Name: Period: TEST: Wednesday 4/27/16

Unit 13 Acids and Bases. Name: Period: TEST: Wednesday 4/27/16 Unit 13 Acids and Bases Name: Perid: TEST: Wednesday 4/27/16 1 Unit 13 Acids and Bases Calendar Mnday Tuesday Wednesday Thursday Friday APRIL 7th Slutins Test 8 th Vide: Acids & Bases Ntes #1 Acids and

More information

SCIENCE 10: CHEMISTRY,

SCIENCE 10: CHEMISTRY, , 1 Atmic Thery and Bnding The Nucleus - The particles that make up an atm are called subatmic particles - The three subatmic particles are prtns, neutrns and electrns. - Prtns, which have a +1 (psitive)

More information

Name: Date: Class: a. How many barium ions are there per formula unit (compound)? b. How many nitride ions are there per formula unit (compound)?

Name: Date: Class: a. How many barium ions are there per formula unit (compound)? b. How many nitride ions are there per formula unit (compound)? NOTES Name: Date: Class: Lessn 15 Part 2: Binary II Inic Bnding, Plyatmic Ins Bx 1: 1. Ba 3N 2 is the frmula fr. (name) a. Hw many barium ins are there per frmula unit (cmpund)? b. Hw many nitride ins

More information

In the spaces provided, explain the meanings of the following terms. You may use an equation or diagram where appropriate.

In the spaces provided, explain the meanings of the following terms. You may use an equation or diagram where appropriate. CEM1405 2007-J-2 June 2007 In the spaces prvided, explain the meanings f the fllwing terms. Yu may use an equatin r diagram where apprpriate. 5 (a) hydrgen bnding An unusually strng diple-diple interactin

More information

Unit 3. Electrochemistry

Unit 3. Electrochemistry Unit 3 Electrcheistry One ark questins 1. What is an electrlyte? An electrlyte is a cpund which cnducts electricity either in its aqueus slutin r in its lten state. e.g Acids HCl, CH 3 COOH, HNO 3 Bases

More information

/ / Chemistry. Chapter 1 Chemical Foundations

/ / Chemistry. Chapter 1 Chemical Foundations Name Chapter 1 Chemical Fundatins Advanced Chemistry / / Metric Cnversins All measurements in chemistry are made using the metric system. In using the metric system yu must be able t cnvert between ne

More information

Q1. A) 48 m/s B) 17 m/s C) 22 m/s D) 66 m/s E) 53 m/s. Ans: = 84.0 Q2.

Q1. A) 48 m/s B) 17 m/s C) 22 m/s D) 66 m/s E) 53 m/s. Ans: = 84.0 Q2. Phys10 Final-133 Zer Versin Crdinatr: A.A.Naqvi Wednesday, August 13, 014 Page: 1 Q1. A string, f length 0.75 m and fixed at bth ends, is vibrating in its fundamental mde. The maximum transverse speed

More information

NUMBERS, MATHEMATICS AND EQUATIONS

NUMBERS, MATHEMATICS AND EQUATIONS AUSTRALIAN CURRICULUM PHYSICS GETTING STARTED WITH PHYSICS NUMBERS, MATHEMATICS AND EQUATIONS An integral part t the understanding f ur physical wrld is the use f mathematical mdels which can be used t

More information

University of Waterloo DEPARTMENT OF CHEMISTRY CHEM 123 Test #2 Wednesday, March 11, 2009

University of Waterloo DEPARTMENT OF CHEMISTRY CHEM 123 Test #2 Wednesday, March 11, 2009 University f Waterl DEPARTMENT OF CHEMISTRY CHEM 13 Test # Wednesday, March 11, 009 This is test versin 001. Fill in vals 001 fr the Card Number (r Test Master) n yur cmputer answer card. Name (Print in

More information

15.0 g Cr = 21.9 g Cr O g Cr 4 mol Cr mol Cr O

15.0 g Cr = 21.9 g Cr O g Cr 4 mol Cr mol Cr O WYSE Academic Challenge Sectinal Chemistry Exam 2008 SOLUTION SET 1. Crrect answer: B. Use PV = nrt t get: PV = nrt 2. Crrect answer: A. (2.18 atm)(25.0 L) = n(0.08206 L atm/ml K)(23+273) n = 2.24 ml Assume

More information

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site. Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring

More information

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.

Find this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site. Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring

More information

4 Fe + 3 O 2 2 Fe 2 O 3

4 Fe + 3 O 2 2 Fe 2 O 3 UNIT 7: STOICHIOMETRY NOTES (chapter 9) INTRO TO STOICHIOMETRY Reactin Stichimetry: Stichimetry is simply a way t shw f smething this is. Relatinship between a given and an unknwn: GIVEN UNKNOWN Type 1

More information

Name: Period: Date: BONDING NOTES HONORS CHEMISTRY

Name: Period: Date: BONDING NOTES HONORS CHEMISTRY Name: Perid: Date: BONDING NOTES HONORS CHEMISTRY Directins: This packet will serve as yur ntes fr this chapter. Fllw alng with the PwerPint presentatin and fill in the missing infrmatin. Imprtant terms

More information

5.0 minutes. The temperature rose from

5.0 minutes. The temperature rose from QUESTION 1 The table belw describes features cmmn t a slutin calrimeter and a bmb calrimeter as well as differences. Features f Bth the Slutin and Bmb alrimeters W X Features f the Bmb alrimeter Only Y

More information

This section is primarily focused on tools to aid us in finding roots/zeros/ -intercepts of polynomials. Essentially, our focus turns to solving.

This section is primarily focused on tools to aid us in finding roots/zeros/ -intercepts of polynomials. Essentially, our focus turns to solving. Sectin 3.2: Many f yu WILL need t watch the crrespnding vides fr this sectin n MyOpenMath! This sectin is primarily fcused n tls t aid us in finding rts/zers/ -intercepts f plynmials. Essentially, ur fcus

More information

Five Whys How To Do It Better

Five Whys How To Do It Better Five Whys Definitin. As explained in the previus article, we define rt cause as simply the uncvering f hw the current prblem came int being. Fr a simple causal chain, it is the entire chain. Fr a cmplex

More information

Medium Scale Integrated (MSI) devices [Sections 2.9 and 2.10]

Medium Scale Integrated (MSI) devices [Sections 2.9 and 2.10] EECS 270, Winter 2017, Lecture 3 Page 1 f 6 Medium Scale Integrated (MSI) devices [Sectins 2.9 and 2.10] As we ve seen, it s smetimes nt reasnable t d all the design wrk at the gate-level smetimes we just

More information

1. Transformer A transformer is used to obtain the approximate output voltage of the power supply. The output of the transformer is still AC.

1. Transformer A transformer is used to obtain the approximate output voltage of the power supply. The output of the transformer is still AC. PHYSIS 536 Experiment 4: D Pwer Supply I. Intrductin The prcess f changing A t D is investigated in this experiment. An integrated circuit regulatr makes it easy t cnstruct a high-perfrmance vltage surce

More information

Name AP CHEM / / Chapter 1 Chemical Foundations

Name AP CHEM / / Chapter 1 Chemical Foundations Name AP CHEM / / Chapter 1 Chemical Fundatins Metric Cnversins All measurements in chemistry are made using the metric system. In using the metric system yu must be able t cnvert between ne value and anther.

More information

Q1. In figure 1, Q = 60 µc, q = 20 µc, a = 3.0 m, and b = 4.0 m. Calculate the total electric force on q due to the other 2 charges.

Q1. In figure 1, Q = 60 µc, q = 20 µc, a = 3.0 m, and b = 4.0 m. Calculate the total electric force on q due to the other 2 charges. Phys10 Secnd Majr-08 Zer Versin Crdinatr: Dr. I. M. Nasser Saturday, May 3, 009 Page: 1 Q1. In figure 1, Q = 60 µc, q = 0 µc, a = 3.0 m, and b = 4.0 m. Calculate the ttal electric frce n q due t the ther

More information

You need to be able to define the following terms and answer basic questions about them:

You need to be able to define the following terms and answer basic questions about them: CS440/ECE448 Sectin Q Fall 2017 Midterm Review Yu need t be able t define the fllwing terms and answer basic questins abut them: Intr t AI, agents and envirnments Pssible definitins f AI, prs and cns f

More information

Student Exploration: Cell Energy Cycle

Student Exploration: Cell Energy Cycle Name: Date: Student Explratin: Cell Energy Cycle Vcabulary: aerbic respiratin, anaerbic respiratin, ATP, cellular respiratin, chemical energy, chlrphyll, chlrplast, cytplasm, glucse, glyclysis, mitchndria,

More information

Chapter 3 Kinematics in Two Dimensions; Vectors

Chapter 3 Kinematics in Two Dimensions; Vectors Chapter 3 Kinematics in Tw Dimensins; Vectrs Vectrs and Scalars Additin f Vectrs Graphical Methds (One and Tw- Dimensin) Multiplicatin f a Vectr b a Scalar Subtractin f Vectrs Graphical Methds Adding Vectrs

More information

READING STATECHART DIAGRAMS

READING STATECHART DIAGRAMS READING STATECHART DIAGRAMS Figure 4.48 A Statechart diagram with events The diagram in Figure 4.48 shws all states that the bject plane can be in during the curse f its life. Furthermre, it shws the pssible

More information

Chapter One Atoms and Elements

Chapter One Atoms and Elements S u m m e r S c h l 2 0 1 4 S c i e n c e S T P a g e 1 Chapter One Atms and Elements Histry f the Atm Daltn s Atmic Mdel Daltn thught f atms as slid, indivisible balls f different Thmsn s Atmic Mdel Thmsn

More information

A.P. CHEMISTRY. SOLUTIONS AND ACID BASE CHEMISTRY. p 1

A.P. CHEMISTRY. SOLUTIONS AND ACID BASE CHEMISTRY. p 1 A.P. CHEMISTRY. SOLUTIONS AND ACID BASE CHEMISTRY. p 1 (Nte: questins 1 t 14 are meant t be dne WITHOUT calculatrs!) 1.Which f the fllwing is prbably true fr a slid slute with a highly endthermic heat

More information

Edexcel IGCSE Chemistry. Topic 1: Principles of chemistry. Chemical formulae, equations and calculations. Notes.

Edexcel IGCSE Chemistry. Topic 1: Principles of chemistry. Chemical formulae, equations and calculations. Notes. Edexcel IGCSE Chemistry Tpic 1: Principles f chemistry Chemical frmulae, equatins and calculatins Ntes 1.25 write wrd equatins and balanced chemical equatins (including state symbls): fr reactins studied

More information

Plan o o. I(t) Divide problem into sub-problems Modify schematic and coordinate system (if needed) Write general equations

Plan o o. I(t) Divide problem into sub-problems Modify schematic and coordinate system (if needed) Write general equations STAPLE Physics 201 Name Final Exam May 14, 2013 This is a clsed bk examinatin but during the exam yu may refer t a 5 x7 nte card with wrds f wisdm yu have written n it. There is extra scratch paper available.

More information

LCAO APPROXIMATIONS OF ORGANIC Pi MO SYSTEMS The allyl system (cation, anion or radical).

LCAO APPROXIMATIONS OF ORGANIC Pi MO SYSTEMS The allyl system (cation, anion or radical). Principles f Organic Chemistry lecture 5, page LCAO APPROIMATIONS OF ORGANIC Pi MO SYSTEMS The allyl system (catin, anin r radical).. Draw mlecule and set up determinant. 2 3 0 3 C C 2 = 0 C 2 3 0 = -

More information

Spontaneous Processes, Entropy and the Second Law of Thermodynamics

Spontaneous Processes, Entropy and the Second Law of Thermodynamics Chemical Thermdynamics Spntaneus Prcesses, Entrpy and the Secnd Law f Thermdynamics Review Reactin Rates, Energies, and Equilibrium Althugh a reactin may be energetically favrable (i.e. prducts have lwer

More information