UNIVERSITY LE CAMPUS. Moderators Dr D. Reddy Dr B. Moodley. Dr L. Pillay Dr G. Birungii. This paper inclusive). answer booklet.
|
|
- Blake Powers
- 6 years ago
- Views:
Transcription
1 SCHOOL OF CHEMISTRY & PHYSICS UNIVERSITY OF KWAZULU-NATAL, WESTVILL LE CAMPUS APCH231 : CHEMICAL ANALYSIS NOVEMBER 2013 MAIN EXAMINATIONN DURATION: 3 HOURS TOTAL MARKS: 100 Moderators Dr D. Reddy Dr B. Moodley Internal Examiners: Dr L. Pillay Dr G. Birungii Instructions: This paper consists of 13 pages (cover page, dataa sheets, and periodic table inclusive). Please check that you have them all. Answer All Questions Please affix your barcode on the front page of each submitted answer booklet. Answer each section (A and B) ) in a separate booklet Students are requested, in their ownn interests to write legibly in black or blue ink. 1
2 SECTION A Question 1 (15 marks) A student compared the accuracy and precision of delivering 10 ml of water from a burette and pipette. The replicate data for the burette measurements is shown below along with the mean data for the pipette. Replicate masses for burette in grams: Mean data for the pipette in grams (4 replicates): 9.99 ± a. Are there any outliers in the measurements from the burette? (3) b. Taking into account (a) above, calculate the mean and standard deviation of the students burette data. (2) c. Do the masses delivered from the burette and pipette differ significantly at the 95% confidence interval? (4) d. Define precision and explain which of the two methods was more precise? (2) e. Calculate the relative error in the analysis for the pipette. (2) f. The analytical balance used for the mass measurements was calibrated with a mass weighing 988 g instead of the 1000 g mass which is recommended. State what type of error would result and explain if that error would affect the precision and/or accuracy. (2) 2
3 Question 2 (17 marks) To calculate the concentration of Cu in an ore sample the following method was carried out. - A solution of thiosulfate was made using sodium thiosulfate pentahydrate (Na 2 S 2 O 3 5 H 2 O, MM g mol -1 ). - This solution was standardised using pure Cu wire. A mass of g of copper wire was dissolved in a mixture of HCl and H 2 SO 4. Approximately 3.0 g of KI was added to the mixture. The I 2 which formed was then titrated with ml of the S 2 O 2-3 solution. The reaction equations are shown below: 2Cu I - 2CuI(s) + I 2 I 2 + 2S 2 O 2-3 2I S 4 O 6 - To calculate the concentration of Cu in the ore sample, a g sample of the ore was dissolved in a mixture of HCl and H 2 SO 4. Approximately 3.0 g of KI was then added to the sample. The iodine produced from the reaction was titrated with ml of the standardised thiosulfate solution. a. Explain why it was necessary to standardise the thiosulfate solution. (1) b. Identify the primary standard. (1) c. List two characteristics of a good primary standard. (2) d. Identify the secondary standard. (1) e. Differentiate between an endpoint and an equivalence point. (2) f. What type of titration reaction is being carried out? Give a reason for your answer. (3) 3
4 g. Starch is the most suitable indicator for this reaction, what type of indicator is starch? (1) h. Calculate the accurate concentration of the standardised thiosulfate solution. (3) i. Calculate the %Cu in the ore. (3) Question 3 (18 marks) The concentration of Fe in the blood of 8 patients was measured using two different methods, one titration and the other spectrophotometric. The results are recorded below. Patient Fe concentration in μg dl -1 Spectrophotometric Titration A B C D E F G H Average Standard deviation a. Calculate if there is a significant difference between the two methods at the 90% confidence interval. (4) 4
5 b. The average value of Fe in blood for a healthy patient is 100 μg dl -1. Using the spectrophotometric method, comment on the health of the patients as a group (use the 99% confidence interval). (3) c. The spectrophotometric method required standards to be made. A 250 ml stock solution of 300 ppm Fe was made using ammonium iron(ii) sulfate hexahydrate, (NH 4 ) 2 Fe(SO 4 ) 2 6H 2 O. Calculate the mass of the salt required to make this solution. (3) d. Two attempts were made at calibration. The calibration curves obtained are shown below. Which calibration curve would you prefer to use. Discuss the reasons for your choice in detail. (3) 600 Calibration A 600 Calibration B intensity y = x R² = concentration intensity y = x R² = concentration e. The titration method was tested using an Fe sample with the following reaction: 5Fe 2+ + MnO H + 5Fe 3+ + Mn H 2 O A 5.00 ± 0.04 ml aliquot of the sample was be titrated with a ± M KMnO 4 solution. The initial burette reading was 0.06 ± 0.02 ml and the final reading ± 0.02 ml. Calculate the molarity and the associated error in the unknown Fe sample. (5) 5
6 SECTION B Question 4 (20 marks) a. In the titration of 25.0 ml of M NH 3 (K b = ) with M HCl, what is the equivalence volume? (1) Calculate the ph after addition of the following amounts of HCL i ml (2) ii ml (2) iii ml (2) iv ml (2) b. The figure below shows the titration curve for the mixture of weak acids HA (pk a = 3) and HB (pk a = 7) with NaOH. Use it to answer the questions that follow. i. State what the points A and B represent. (1) ii. Points A is at 38.0 ml and point B is at 50.0 ml. Which of the acids has a higher concentration? Give an explanation for your answer. (2) 6
7 iii. What do regions X and Y represent? Write down the species which exist in these regions. (2) c. Consider the speciation diagram of aqueous phthalic acid, H 2 P, below: Fractional composition of phthalate solution as a function of ph ph i. What is the fractional composition of a phthalate solution at ph = 4.1 (2) ii. Estimate the value of K a2 for phthalic acid from the diagram. Give an explanation for your answer. (2) iii. Using your data sheet choose a suitable indicator for the titration of H 2 P with NaOH. Explain your choice in detail. (2) 7
8 Question 5 (16 Marks) a. For a titration of ml of M Pb 2+ with M EDTA at ph 10, calculate ppb at the equivalence point given that log K f = Show your working. (6) b. Sketch two titration curves, on a single set of labelled axes, to show the effect of ph on the titration of Pb 2+ with EDTA. (2) c. Explain briefly how a metallochromic indicator works in a titration of a metal ion with EDTA. (2) d. Calcium and magnesium were extracted from g of soil and the extract was made up to a final volume of ml. A ml portion of the diluted extract was adjusted to ph 10 with a suitable buffer, an indicator was added and the mixture was titrated with M EDTA solution. The titration required 9.72 ml. A second ml portion of the diluted extract was made strongly basic to precipitate out the calcium. The remaining solution required 2.47 ml of the M EDTA solution to reach the end point. Calculate the percentage of calcium and magnesium in the soil sample. (6) Question 6 (14 marks) a. In the gravimetric determination of chloride by precipitation of silver chloride, after the precipitate is first formed it is heated for several minutes and then allowed to stand. The precipitate is then filtered and washed with very dilute nitric acid. 8
9 i. What happens to the silver chloride precipitate when it is heated? Explain clearly. (2) ii. Why is the precipitate washed with dilute nitric acid rather than with pure water? Explain briefly. (2) b. In a titration of 50.0 ml of a mixture of M iodide ion and M chloride ion with M silver nitrate. Given that the solubility products are for AgI and for AgCl, calculate: i. The pag after addition of ml of silver nitrate (2) ii. The pag after addition of ml of silver nitrate (2) iii. Sketch a curve for this titration and on it label the endpoint due to the iodide (2) iv. Calculate the percentage of iodide unprecipitated after addition of ml of silver chloride. (4) 9
10 Data s pooled 2 a a b 2 b s ( Na 1) s ( Nb 1)... N N... Nsets of data x μ t calculated s / N Critical values of F at the 5% Probability Level (95% confidence) Degrees of Freedom (Denominator) Degrees of Freedom (Numerator)
11 Critical Values for the t-statistic Confidence level degrees 50% 90% 95% 99% Freedom Critical Values for the Q-statistic N 90% Confidence Rejection Quotient 95% Confidence 99% Confidence N = number of observations Indicator Name pka Quinaldine Red 2.75 Methyl Orange 3.46 Bromophenol Blue 4.10 Bromocresol Green 4.66 Methyl Red 5.00 Bromothymol Blue 7.10 Phenol Red 7.81 m-nitrophenol 8.15 o-cresolphthalein 8.82 Phenolphthalein
12 Values of α 4 for EDTA at selected ph values. ph α K a of Weak Acids Name Formula K a acetic HC 2 H 3 O x 10-5 carbonic (I) H 2 CO x 10-7 carbonic (II) - HCO x citric (I) H 3 C 6 H 5 O x 10-7 citric (II) - H 2 C 6 H 5 O x 10 5 citric (III) 2- HC 6 H 5 O x 10-7 formic HCHO x 10-4 hydrazidic HN x 10-5 hydrocyanic HCN 6.2 x hydrofluoric HF 6.3 x 10-4 lactic HC 3 H 5 O x 10-4 nitrous HNO x 10-4 oxalic (I) H 2 C 2 O x 10-2 oxalic (II) - HC 2 O x 10-5 phenol HOC 6 H x propanic HC 3 H 5 O x 10-5 sulfurous (I) H 2 SO x 10-2 sulfurous (II) - HSO x 10-8 uric HC 5 H 3 N 4 O x 10-4 For a weak acid H n A the denominator will be... 12
13 H Periodic Table He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba * La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po (209) 85 At (210) 86 Rn (222) 87 Fr (223) 88 Ra (226) 89** Ac (227) 104 Db (261) 105 Jl (262) 106 Rf (263) 107 Bh (262) 108 Hn (?) 109 Mt (?) * Lanthanide Series 58 Ce Pr Nd Pm (147) 62 Sm Eu Gd Tb Dy Ho Er Tm Yb Lu ** Actinide Series 90 Th (232) 91 Pa (231) 92 U (238) 93 Np (237) 94 Pu (239) 95 Am (243) 96 Cm (247) 97 Bk (247) 98 Cf (252) 99 Es (252) 100 Fm (257) 101 Md (256) 102 No (259) 103 Lr (260)
Faculty of Natural and Agricultural Sciences Chemistry Department. Semester Test 1. Analytical Chemistry CMY 283. Time: 120 min Marks: 100 Pages: 6
Faculty of Natural and Agricultural Sciences Chemistry Department Semester Test 1 Analytical Chemistry CMY 283 Date: 5 September 2016 Lecturers : Prof P Forbes, Dr Laurens, Mr SA Nsibande Time: 120 min
More informationFaculty of Natural and Agricultural Sciences Chemistry Department. Semester Test 1 MEMO. Analytical Chemistry CMY 283
Faculty of Natural and Agricultural Sciences Chemistry Department Semester Test 1 MEMO Analytical Chemistry CMY 283 Date: 5 September 2016 Lecturers : Prof P Forbes, Dr Laurens, Mr SA Nsibande Time: 90
More informationCHEM 107 (Spring-2004) Exam 2 (100 pts)
CHEM 107 (Spring-2004) Exam 2 (100 pts) Name: ------------------------------------------------------------------------, SSN -------------------------------- LAST NAME, First (Circle the alphabet segment
More informationChemistry 2 Exam Roane State Academic Festival. Name (print neatly) School
Name (print neatly) School There are fifteen question on this exam. Each question is weighted equally. n the answer sheet, write your name in the space provided and your answers in the blanks provided.
More information(please print) (1) (18) H IIA IIIA IVA VA VIA VIIA He (2) (13) (14) (15) (16) (17)
CHEM 10113, Quiz 3 September 28, 2011 Name (please print) All equations must be balanced and show phases for full credit. Significant figures count, show charges as appropriate, and please box your answers!
More informationScholarship 2006 Chemistry
For Supervisor s S 9 3 1 0 2 Scholarship 2006 Chemistry 2.00 pm Saturday 25 November 2006 Time allowed: Three hours Total Marks: 48 Check that the National Student Number (NSN) on your admission slip is
More informationChem 102H Exam 2 - Spring 2005
Name I.D. # Chem 102H Exam 2 - Spring 2005 PHYSICAL CNSTANTS/CNVERSIN FACTRS Speed of light = 3.00! 10 8 m/s Planck!s const. = 6.63! 10-34 J s Avagadro!s Number = 6.02! 10 23 Electron charge = 1.602! 10-19
More informationChapter 3: Stoichiometry
Chapter 3: Stoichiometry Chem 6A Michael J. Sailor, UC San Diego 1 Announcements: Thursday (Sep 29) quiz: Bring student ID or we cannot accept your quiz! No notes, no calculators Covers chapters 1 and
More informationCHEM 108 (Spring-2008) Exam. 3 (105 pts)
CHEM 08 (Spring-008) Exam. (05 pts) Name: --------------------------------------------------------------------------, CLID # -------------------------------- LAST NAME, First (Circle the alphabet segment
More information(C) Pavel Sedach and Prep101 1
(C) Pavel Sedach and Prep101 1 (C) Pavel Sedach and Prep101 1 (C) Pavel Sedach and Prep101 2 (C) Pavel Sedach and Prep101 2 (C) Pavel Sedach and Prep101 3 (C) Pavel Sedach and Prep101 3 (C) Pavel Sedach
More informationCHEM 10123/10125, Exam 2
CHEM 10123/10125, Exam 2 March 7, 2012 (50 minutes) Name (please print) Please box your answers, and remember that significant figures, phases (for chemical equations), and units do count! 1. (13 points)
More informationLast 4 Digits of USC ID:
Chemistry 05 B Practice Exam Dr. Jessica Parr First Letter of last Name PLEASE PRINT YOUR NAME IN BLOCK LETTERS Name: Last 4 Digits of USC ID: Lab TA s Name: Question Points Score Grader 8 2 4 3 9 4 0
More information8. Relax and do well.
CHEM 1314.03 Exam I John I. Gelder September 25, 1997 Name TA's Name Lab Section Please sign your name below to give permission to post, by the last 4 digits of your student I.D. number, your course scores
More information7. Relax and do well.
CHEM 1215 Exam II John II. Gelder October 13, 1999 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 5 different pages. The last page includes a periodic table and a solubility
More informationLab Day and Time: Instructions. 1. Do not open the exam until you are told to start. Page # Points possible Points awarded
Name: Lab Day and Time: Instructions 1. Do not open the exam until you are told to start. 2. This exam is closed note and closed book. You are not allowed to use any outside material while taking this
More information8. Relax and do well.
CHEM 1225 Exam III John III. Gelder April 8, 1999 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 7 different pages. The last two pages includes a periodic table and
More informationTRU Chemistry Contest Chemistry 12 May 21, 2003 Time: 90 minutes
TRU Chemistry Contest Chemistry 12 May 21, 2003 Time: 90 minutes Last Name First name School Teacher Please follow the instructions below. We will send your teacher a report on your performance. Top performers
More information8. Relax and do well.
CHEM 1215 Exam III John III. Gelder November 11, 1998 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 7 different pages. The last page includes a periodic table and
More information8. Relax and do well.
CHEM 1314 3;30 pm Theory Exam III John III. Gelder November 13, 2002 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 8 different pages. The last page include a periodic
More informationINSTRUCTIONS: CHEM Exam I. September 13, 1994 Lab Section
CHEM 1314.05 Exam I John I. Gelder September 13, 1994 Name TA's Name Lab Section Please sign your name below to give permission to post, by the last 4 digits of your student I.D. number, your course scores
More informationLab Day and Time: Instructions. 1. Do not open the exam until you are told to start.
Name: Lab Day and Time: Instructions 1. Do not open the exam until you are told to start. 2. This exam is closed note and closed book. You are not allowed to use any outside material while taking this
More information7. Relax and do well.
CHEM 1215 Exam II John II. Gelder October 7, 1998 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 5 different pages. The last page includes a periodic table and a solubility
More informationPERIODIC TABLE OF THE ELEMENTS
Useful Constants and equations: K = o C + 273 Avogadro's number = 6.022 x 10 23 d = density = mass/volume R H = 2.178 x 10-18 J c = E = h = hc/ h = 6.626 x 10-34 J s c = 2.998 x 10 8 m/s E n = -R H Z 2
More informationINSTRUCTIONS: Exam III. November 10, 1999 Lab Section
CHEM 1215 Exam III John III. Gelder November 10, 1999 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 7 different pages. The last page includes a periodic table and
More informationThe Periodic Table. Periodic Properties. Can you explain this graph? Valence Electrons. Valence Electrons. Paramagnetism
Periodic Properties Atomic & Ionic Radius Energy Electron Affinity We want to understand the variations in these properties in terms of electron configurations. The Periodic Table Elements in a column
More informationLab Day and Time: Instructions. 1. Do not open the exam until you are told to start.
Name: Lab Day and Time: Instructions 1. Do not open the exam until you are told to start. 2. This exam is closed note and closed book. You are not allowed to use any outside material while taking this
More informationSolutions and Ions. Pure Substances
Class #4 Solutions and Ions CHEM 107 L.S. Brown Texas A&M University Pure Substances Pure substance: described completely by a single chemical formula Fixed composition 1 Mixtures Combination of 2 or more
More informationCHEM 10113, Quiz 5 October 26, 2011
CHEM 10113, Quiz 5 October 26, 2011 Name (please print) All equations must be balanced and show phases for full credit. Significant figures count, show charges as appropriate, and please box your answers!
More informationChem 51, Spring 2015 Exam 8 (Chp 8) Use your Scantron to answer Questions There is only one answer for each Question. Questions are 2 pt each.
Chem 51, Spring 2015 Exam 8 (Chp 8) Name 120 pt Use your Scantron to answer Questions 1-32. There is only one answer for each Question. Questions are 2 pt each. CHP 8.1 Solutions are Mixtures 1. A saturated
More informationHANDOUT SET GENERAL CHEMISTRY I
HANDOUT SET GENERAL CHEMISTRY I Periodic Table of the Elements 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 IA VIIIA 1 2 H He 1.00794 IIA IIIA IVA VA VIA VIIA 4.00262 3 Li 6.941 11 Na 22.9898
More information7. Relax and do well.
CHEM 1014 Exam III John III. Gelder November 18, 1999 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 7 different pages. The last page includes a periodic table and
More informationPart 2. Multiple choice (use answer card). 90 pts. total. 3 pts. each.
1 Exam I CHEM 1303.001 Name (print legibly) Seat no. On my honor, I have neither given nor received unauthorized aid on this exam. Signed Date Part 1. Nomenclature. 10 pts. total. 2 pts. each. Fill in
More informationLab Day and Time: Instructions. 1. Do not open the exam until you are told to start.
Name: Lab Day and Time: Instructions 1. Do not open the exam until you are told to start. 2. This exam is closed note and closed book. You are not allowed to use any outside material while taking this
More informationCHEM 107 (Spring-2005) Exam 3 (100 pts)
CHEM 107 (Spring-2005) Exam 3 (100 pts) Name: ------------------------------------------------------------------------, Clid # ------------------------------ LAST NAME, First (Circle the alphabet segment
More informationRadiometric Dating (tap anywhere)
Radiometric Dating (tap anywhere) Protons Neutrons Electrons Elements on the periodic table are STABLE Elements can have radioactive versions of itself called ISOTOPES!! Page 1 in your ESRT has your list!
More information02/05/09 Last 4 Digits of USC ID: Dr. Jessica Parr
Chemistry 05 B First Letter of PLEASE PRINT YOUR NAME IN BLOCK LETTERS Exam last Name Name: 02/05/09 Last 4 Digits of USC ID: Dr. Jessica Parr Lab TA s Name: Question Points Score Grader 2 2 9 3 9 4 2
More information8. Relax and do well.
CHEM 1515 Exam II John II. Gelder October 14, 1993 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 8 different pages. The last two pages include a periodic table, a
More informationCircle the letters only. NO ANSWERS in the Columns! (3 points each)
Chemistry 1304.001 Name (please print) Exam 4 (100 points) April 12, 2017 On my honor, I have neither given nor received unauthorized aid on this exam. Signed Date Circle the letters only. NO ANSWERS in
More informationMarks for each question are as indicated in [] brackets.
Name Student Number CHEMISTRY 140 FINAL EXAM December 10, 2002 Numerical answers must be given with appropriate units and significant figures. Please place all answers in the space provided for the question.
More informationAtoms and the Periodic Table
Atoms and the Periodic Table Parts of the Atom Proton Found in the nucleus Number of protons defines the element Charge +1, mass 1 Parts of the Atom Neutron Found in the nucleus Stabilizes the nucleus
More informationThe Periodic Table of Elements
The Periodic Table of Elements 8 Uuo Uus Uuh (9) Uup (88) Uuq (89) Uut (8) Uub (8) Rg () 0 Ds (9) 09 Mt (8) 08 Hs (9) 0 h () 0 Sg () 0 Db () 0 Rf () 0 Lr () 88 Ra () 8 Fr () 8 Rn () 8 At (0) 8 Po (09)
More informationInstructions. 1. Do not open the exam until you are told to start.
Name: Lab Day and Time: Instructions 1. Do not open the exam until you are told to start. 2. This exam is closed note and closed book. You are not allowed to use any outside material while taking this
More informationInstructions. 1. Do not open the exam until you are told to start.
Name: Lab Day and Time: Instructions 1. Do not open the exam until you are told to start. 2. This exam is closed note and closed book. You are not allowed to use any outside material while taking this
More informationChemistry 431 Practice Final Exam Fall Hours
Chemistry 431 Practice Final Exam Fall 2018 3 Hours R =8.3144 J mol 1 K 1 R=.0821 L atm mol 1 K 1 R=.08314 L bar mol 1 K 1 k=1.381 10 23 J molecule 1 K 1 h=6.626 10 34 Js N A = 6.022 10 23 molecules mol
More information7. Relax and do well.
CHEM 1215 Exam II John II. Gelder October 7, 1998 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 5 different pages. The last page includes a periodic table and a solubility
More informationCHEM 171 EXAMINATION 1. October 9, Dr. Kimberly M. Broekemeier. NAME: Key
CHEM 171 EXAMINATION 1 October 9, 008 Dr. Kimberly M. Broekemeier NAME: Key I A II A III B IV B V B VI B VII B VIII I B II B III A IV A V A VI A VII A inert gase s 1 H 1.008 Li.941 11 Na.98 19 K 9.10 7
More informationElement Cube Project (x2)
Element Cube Project (x2) Background: As a class, we will construct a three dimensional periodic table by each student selecting two elements in which you will need to create an element cube. Helpful Links
More information8. Relax and do well.
CHEM 1014 Exam I John I. Gelder September 16, 1999 Name TA's Name Lab Section Please sign your name below to give permission to post your course scores on homework, laboratories and exams. If you do not
More information8. Relax and do well.
CHEM 15 Exam II John II. Gelder March 4, 1999 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 7 different pages. The last two pages includes a periodic table, a solubility
More informationM09/4/CHEMI/SPM/ENG/TZ1/XX+ CHEMISTRY. Monday 18 May 2009 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES
M09/4/CHEMI/SPM/ENG/TZ1/XX+ 22096110 CHEMISTRY standard level Paper 1 Monday 18 May 2009 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES Do not open this examination paper until instructed to do so.
More informationChem GENERAL CHEMISTRY I MIDTERM EXAMINATION
Concordia University CHEM 205 Fall 2009, B LAST NAME: FIRST NAME: STUDENT ID: Chem 205 - GENERAL CHEMISTRY I MIDTERM EXAMINATION PLEASE READ THIS BOX WHILE WAITING TO START INSTRUCTIONS: Calculators are
More information8. Relax and do well.
CHEM 1225 Exam I John I. Gelder February 4, 1999 Name KEY TA's Name Lab Section Please sign your name below to give permission to post your course scores on homework, laboratories and exams. If you do
More informationSAMPLE EXAMINATION BOOKLET
S SAMPLE EXAMINATION BOOKLET New Zealand Scholarship Chemistry Time allowed: Three hours Total marks: 40 EXAMINATION BOOKLET Question ONE TWO Mark You should answer ALL the questions in this booklet. THREE
More informationCHEM 167 FINAL EXAM MONDAY, MAY 2 9:45 11:45 A.M GILMAN HALL
PROF. JOHN VERKADE SPRING 2005 THIS EXAM CONSISTS OF 12 QUESTIONS ON 9 PAGES CHEM 167 HOUR EXAM IV APRIL 20, 2005 SEAT NO. NAME RECIT. INSTR. RECIT. SECT. GRADING PAGE Page 2 Page 3 Page 4 Page 5 Page
More informationK. 27 Co. 28 Ni. 29 Cu Rb. 46 Pd. 45 Rh. 47 Ag Cs Ir. 78 Pt.
1 IA 1 H Hydrogen 1.01 Atomic number Element symbol Element name Atomic mass VIIIA 1 H 1.01 IIA IIIA IVA VA VIA VIIA 2 He 4.00 Metalloids 3 Li 6.94 4 Be 9.01 5 B 10.81 6 C 12.01 7 N 14.01 8 O 16.00 9 F
More informationM10/4/CHEMI/SPM/ENG/TZ2/XX+ CHEMISTRY. Wednesday 12 May 2010 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES
M10/4/CHEMI/SPM/ENG/TZ/XX+ 106116 CHEMISTRY standard level Paper 1 Wednesday 1 May 010 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES Do not open this examination paper until instructed to do so. Answer
More informationHANDOUT SET GENERAL CHEMISTRY II
HANDOUT SET GENERAL CHEMISTRY II Periodic Table of the Elements 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 IA VIIIA 1 2 H He 1.00794 IIA IIIA IVA VA VIA VIIA 4.00262 3 Li 6.941 11 Na 22.9898
More informationFall 2011 CHEM Test 4, Form A
Fall 2011 CHEM 1110.40413 Test 4, Form A Part I. Multiple Choice: Clearly circle the best answer. (60 pts) Name: 1. The common constituent in all acid solutions is A) H 2 SO 4 B) H 2 C) H + D) OH 2. Which
More informationAdvanced Placement. Chemistry. Integrated Rates
Advanced Placement Chemistry Integrated Rates 204 47.90 9.22 78.49 (26) 50.94 92.9 80.95 (262) 52.00 93.94 83.85 (263) 54.938 (98) 86.2 (262) 55.85 0. 90.2 (265) 58.93 02.9 92.2 (266) H Li Na K Rb Cs Fr
More informationPOLYTECHNIC OF NAMIBIA
POLYTECHNIC OF NAMIBIA DEPARTMENT OF HEALTH SCIENCES BACHELOR OF ENVIRONMENTAL HEALTH SCIENCES HEALTH SCIENCE CHEMISTRY (HSC 511S) NQF level 5 SECOND OPPORTUNITY EXAMINATION November 2014 TIME: MARKS:
More informationGuide to the Extended Step-Pyramid Periodic Table
Guide to the Extended Step-Pyramid Periodic Table William B. Jensen Department of Chemistry University of Cincinnati Cincinnati, OH 452201-0172 The extended step-pyramid table recognizes that elements
More informationM11/4/CHEMI/SPM/ENG/TZ2/XX CHEMISTRY STANDARD LEVEL PAPER 1. Monday 9 May 2011 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES
M11/4/CHEMI/SPM/ENG/TZ/XX 116116 CHEMISTRY STANDARD LEVEL PAPER 1 Monday 9 May 011 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES Do not open this examination paper until instructed to do so. Answer
More informationLab Day and Time: Instructions. 1. Do not open the exam until you are told to start.
Name: Lab Day and Time: Instructions 1. Do not open the exam until you are told to start. 2. This exam is closed note and closed book. You are not allowed to use any outside material while taking this
More informationChem Exam 1. September 26, Dr. Susan E. Bates. Name 9:00 OR 10:00
Chem 1711 Exam 1 September 26, 2013 Dr. Susan E. Bates Name 9:00 OR 10:00 N A = 6.022 x 10 23 mol 1 I A II A III B IV B V B VI B VII B VIII I B II B III A IV A V A VI A VII A inert gases 1 H 1.008 3 Li
More informationCLASS TEST GRADE 11. PHYSICAL SCIENCES: CHEMISTRY Test 4: Matter and materials 1
CLASS TEST GRADE PHYSICAL SCIENCES: CHEMISTRY Test 4: Matter and materials MARKS: 45 TIME: hour INSTRUCTIONS AND INFORMATION. Answer ALL the questions. 2. You may use non-programmable calculators. 3. You
More informationK. 27 Co. 28 Ni. 29 Cu Rb. 46 Pd. 45 Rh. 47 Ag Cs Ir. 78 Pt.
1 IA 1 ydrogen 1.01 Atomic number Element symbol Element name Atomic mass VIIIA 1 1.01 IIA IIIA IVA VA VIA VIIA 2 e 4.00 Metalloids 3 Li 6.94 4 Be 9.01 5 B 10.81 6 C 12.01 7 N 14.01 8 O 16.00 9 F 19.00
More informationBROOKLYN COLLEGE Department of Chemistry. Chemistry 1 Second Lecture Exam Nov. 27, Name Page 1 of 5
BROOKLYN COLLEGE Department of Chemistry Chemistry 1 Second Lecture Exam Nov. 27, 2002 Name Page 1 of 5 Circle the name of your lab instructor Kobrak, Zhou, Girotto, Hussey, Du Before you begin the exam,
More informationThe Periodic Table of the Elements
The Periodic Table of the Elements All matter is composed of elements. All of the elements are composed of atoms. An atom is the smallest part of an element which still retains the properties of that element.
More informationDURATION: 2 HOUR 45 MINUTES
1 Exam 9 Our country, our future 525/1 S6 CHEMISTRY PAPER 1 DURATION: 2 HOUR 45 MINUTES For Marking guide contact and consultations: Dr. Bbosa Science 0776 802709. Answer all question in part I and six
More informationCHM 101 PRACTICE TEST 1 Page 1 of 4
CHM 101 PRACTICE TEST 1 Page 1 of 4 Please show calculations (stuffed equations) on all mathematical problems!! On the actual test, "naked answers, with no work shown, will receive no credit even if correct.
More informationOregon State University, Summer 2009 Chemistry 121 Midterm Exam 2, July 3rd, 10 am
Oregon State University, Summer 2009 Chemistry 121 Midterm Exam 2, July 3rd, 10 am DO NOT OPEN THIS EXAM UNTIL INSTRUCTED. CALCULATORS ARE NOT TO BE SHARED. Instructions : You should have with you several
More informationGENERAL PRINCIPLES OF CHEMISTRY - CHEM110 TEST 3
School of Chemistry, University of KwaZulu-Natal, Westville Campus GENERAL PRINCIPLES CHEMISTRY - CHEM110 TEST 3 Date: WEDNESDAY, 5 May 2010 Total marks: 25 Time: 18h00 18h45 Examiners: Mrs H Govender
More informationNucleus. Electron Cloud
Atomic Structure I. Picture of an Atom Nucleus Electron Cloud II. Subatomic particles Particle Symbol Charge Relative Mass (amu) protons p + +1 1.0073 neutrons n 0 1.0087 electrons e - -1 0.00054858 Compare
More informationMade the FIRST periodic table
Made the FIRST periodic table 1869 Mendeleev organized the periodic table based on the similar properties and relativities of certain elements Later, Henri Moseley organized the elements by increasing
More informationChemistry Standard level Paper 1
M15/4/CHEMI/SPM/ENG/TZ1/XX Chemistry Standard level Paper 1 Thursday 14 May 2015 (afternoon) 45 minutes Instructions to candidates Do not open this examination paper until instructed to do so. Answer all
More informationSCIENCE 1206 UNIT 2 CHEMISTRY. September 2017 November 2017
SCIENCE 1206 UNIT 2 CHEMISTRY September 2017 November 2017 UNIT OUTLINE 1. Review of Grade 9 Terms & the Periodic Table Bohr diagrams Evidence for chemical reactions Chemical Tests 2. Naming & writing
More informationCh. 9 NOTES ~ Chemical Bonding NOTE: Vocabulary terms are in boldface and underlined. Supporting details are in italics.
Ch. 9 NOTES ~ Chemical Bonding NOTE: Vocabulary terms are in boldface and underlined. Supporting details are in italics. I. Review: Comparison of ionic and molecular compounds Molecular compounds Ionic
More informationPHYSICAL SCIENCES GRADE : 10
PHYSICAL SCIENCES GRADE : 0 TIME : hour TOTAL : 75 INSTRUCTIONS AND INFORMATION. Write your full name on your answer book in the appropriate place. 2. The question paper consists of SEVEN questions. Answer
More informationOur country, our future 525/1 S6 CHEMISTRY PAPER 1 DURATION: 2 HOUR 45 MINUTES
1 Our country, our future 525/1 S6 CHEMISTRY Exam 10 PAPER 1 DURATION: 2 HOUR 45 MINUTES For Marking guide contact and consultations: Dr. Bbosa Science 0776 802709, Instructions - This paper consists of
More informationCircle the letters only. NO ANSWERS in the Columns!
Chemistry 1304.001 Name (please print) Exam 5 (100 points) April 18, 2018 On my honor, I have neither given nor received unauthorized aid on this exam. Signed Date Circle the letters only. NO ANSWERS in
More informationK. 27 Co. 28 Ni. 29 Cu Rb. 46 Pd. 45 Rh. 47 Ag Cs Ir. 78 Pt.
1 IA 1 ydrogen 1.01 Atomic number Element symbol Element name Atomic mass VIIIA 1 1.01 IIA IIIA IVA VA VIA VIIA 2 e 4.00 Metalloids 3 Li 6.94 4 Be 9.01 5 B 10.81 6 C 12.01 7 N 14.01 8 O 16.00 9 F 19.00
More informationUsing the Periodic Table
MATH SKILLS TRANSPARENCY WORKSHEET Using the Periodic Table 6 Use with Chapter 6, Section 6.2 1. Identify the number of valence electrons in each of the following elements. a. Ne e. O b. K f. Cl c. B g.
More informationChapter 1 -- Introduction to Qualitative Analysis. NAME: Lab Section: Date: Sign-Off:
Chapter 1 -- Introduction to Qualitative Analysis NAME: Lab Section: Date: Sign-Off: Chapter 1 -- Introduction to Qualitative Analysis Introduction Qualitative analysis is a way inorganic chemists have
More information610B Final Exam Cover Page
1 st Letter of Last Name NAME: 610B Final Exam Cover Page No notes or calculators of any sort allowed. You have 3 hours to complete the exam. CHEM 610B, 50995 Final Exam Fall 2003 Instructor: Dr. Brian
More informationSecondary Support Pack. be introduced to some of the different elements within the periodic table;
Secondary Support Pack INTRODUCTION The periodic table of the elements is central to chemistry as we know it today and the study of it is a key part of every student s chemical education. By playing the
More informationUNIVERSITY OF CALGARY FACULTY OF SCIENCE MIDTERM EXAMINATION CHEMISTRY 353 READ ALL THE INSTRUCTIONS CAREFULLY
WEDNESDAY MARCH 9th, 2016 UNIVERSITY OF CALGARY FACULTY OF SCIENCE MIDTERM EXAMINATION CHEMISTRY 353 Version 1 Time: 2 Hours READ ALL THE INSTRUCTIONS CAREFULLY PLEASE WRITE YOUR NAME, STUDENT I.D. NUMBER
More information1 Genesis 1:1. Chapter 10 Matter. Lesson. Genesis 1:1 In the beginning God created the heavens and the earth. (NKJV)
1 Genesis 1:1 Genesis 1:1 In the beginning God created the heavens and the earth. (NKJV) 1 Vocabulary Saturated having all the solute that can be dissolved at that temperature Neutron a particle with no
More informationCHEM 130 Exp. 8: Molecular Models
CHEM 130 Exp. 8: Molecular Models In this lab, we will learn and practice predicting molecular structures from molecular formulas. The Periodic Table of the Elements IA 1 H IIA IIIA IVA VA VIA VIIA 3 5
More informationChemistry Standard level Paper 1
Chemistry Standard level Paper 1 Thursday 12 May 2016 (morning) 45 minutes Instructions to candidates Do not open this examination paper until instructed to do so. Answer all the questions. For each question,
More informationM10/4/CHEMI/SPM/ENG/TZ1/XX+ CHEMISTRY. Wednesday 12 May 2010 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES
M10/4/EMI/SPM/ENG/TZ1/XX+ 22106110 EMISTRY standard level Paper 1 Wednesday 12 May 2010 (afternoon) 45 minutes INSTRUTIONS TO ANDIDATES Do not open this examination paper until instructed to do so. Answer
More information8. Relax and do well.
CHEM 1515 Name Exam III TA's Name John III. Gelder April 7, 1993 Lab Section INSTRUCTIONS: 1. This examination consists of a total of 8 different pages. The last 2 pages include important mathematical
More information9/20/2017. Elements are Pure Substances that cannot be broken down into simpler substances by chemical change (contain Only One Type of Atom)
CAPTER 6: TE PERIODIC TABLE Elements are Pure Substances that cannot be broken down into simpler substances by chemical change (contain Only One Type of Atom) The Periodic Table (Mendeleev) In 1872, Dmitri
More informationChemistry 1 First Lecture Exam Fall Abbasi Khajo Levine Mathias Mathias/Ortiz Metlitsky Rahi Sanchez-Delgado Vasserman
Chemistry 1 First Lecture Exam Fall 2011 Page 1 of 9 NAME Circle the name of your recitation/lab instructor(s) Abbasi Khajo Levine Mathias Mathias/Ortiz Metlitsky Rahi Sanchez-Delgado Vasserman Before
More informationEssential Chemistry for Biology
1 Chapter 2 Essential Chemistry for Biology Biology and Society: More Precious than Gold A drought is a period of abnormally dry weather that changes the environment and one of the most devastating disasters.
More informationChemistry 185 Exam #2 - A November 5, Lab Day and Time: Instructions. 1. Do not open the exam until you are told to start.
Name: Lab Day and Time: Instructions 1. Do not open the exam until you are told to start. 2. This exam is closed note and closed book. You are not allowed to use any outside material while taking this
More informationChem 401 Unit 2 Exam Spr 2018 (Acids/ Bases/ General Equilibria /Acid-Base Equilibria)
Name: Date: Exam #: _ Chem 401 Unit 2 Exam Spr 2018 (Acids/ Bases/ General Equilibria /Acid-Base Equilibria) Multiple Choice Identify the letter of the choice that best completes the statement or answers
More informationA little history. When and How? Sir William Ramsey. ü 12/5/13. ü 1. Who put together the first useable Periodic Table?
ü // A little history Johahann Dobereiner (80-89) o Triads John Newlands (8-898) o Law of Octaves Who put together the first useable ic Table? Mendeleev you remember him right? When and How? You know it
More informationChem October 31, Dr. Susan E. Bates
Chem 1711 Exam 2 ID#: 2013171 October 31, 2013 Dr. Susan E. Bates Name 9:00 OR 10:00 PV = nrt 1 atm = 760 mmhg = 101.3 kpa u = (3RT/M m ) 1/2 R = 0.08206 L atm K 1 mol 1 OR 8.314 J K 1 mol 1 22.4 L/mol
More informationThe exam must be written in ink. No calculators of any sort allowed. You have 2 hours to complete the exam. Periodic table 7 0
Email: The exam must be written in ink. No calculators of any sort allowed. You have 2 hours to complete the exam. CEM 610B Exam 3 Spring 2002 Instructor: Dr. Brian Pagenkopf Page Points 2 6 3 7 4 9 5
More information5 questions, 3 points each, 15 points total possible. 26 Fe Cu Ni Co Pd Ag Ru 101.
Physical Chemistry II Lab CHEM 4644 spring 2017 final exam KEY 5 questions, 3 points each, 15 points total possible h = 6.626 10-34 J s c = 3.00 10 8 m/s 1 GHz = 10 9 s -1. B= h 8π 2 I ν= 1 2 π k μ 6 P
More information