Today is Friday (!), April 15 th, 2016
|
|
- Sabrina Pierce
- 6 years ago
- Views:
Transcription
1 In This Lesson: Chemical Reactions (Lesson 3 of 4) Today is Friday (!), April 15 th, 2016 Pre-Class: What s that?
2 Today s Agenda Where we are and where we ve been. Chemical Reactions Balancing Chemical Equations Types of Chemical Reactions Where is this in my book? P. 321 and following
3 By the end of this lesson You should be able to write, balance, classify, and predict chemical reactions.
4 A Wide-Range Review Way back, in a time called the beginning of the semester and a place called here, we talked about matter. We looked at its forms and properties. We learned how to measure it and describe it. We talked about what it s made of (atoms) and what atoms are made of too.
5 A Wide-Range Review Then we talked about electrons. We talked about where we might find them at any given time and how they re arranged in elements. We talked about how chemists arrange elements in the periodic table. We learned how elements bond with one another.
6 A Wide-Range Review We also learned how to name the combinations they form. We learned another scale for measurement: the mole. We learned how to measure proportions and write formulas. Now, we re going to learn how to write formulas for entire chemical reactions.
7 Chemical Reactions A chemical reaction is when a set of chemicals is changed into another set of chemicals. Reactions can be endergonic or exergonic. Endergonic: Energy absorbed. Exergonic: Energy released. Exergonic reactions can happen spontaneously. More on this to come in the next unit.
8 Chemical Reactions Previously, we discussed how reactions are shown in basic form: Reactants (starting stuff) are shown on the left of the equation. Products (ending stuff) are shown on the right of the equation. The arrow means yields. Example: Reactant(s) Product(s) 4Fe + 3O 2 2Fe 2 O 3
9 Identify the reactant(s): Na + Cl NaCl Na, Cl Identify the reactant(s): 2H 2 O 2H 2 + O 2 H 2 O Identify the product(s): Na + Cl NaCl NaCl Identify the product(s): 2H 2 O 2H 2 + O 2 H 2 + O 2 Just checking
10 One other thing Don t forget the symbols we covered back in the beginning of the year: (s) means a chemical is in solid form. (l) means a chemical is in liquid form. Most liquids will be H 2 O for us. (g) means a chemical is in gaseous form. Watch for BrINClHOF elements! (aq) means a chemical is in aqueous form dissolved in water. Acids are always (aq).
11 Lastly Don t forget the BrINClHOF (diatomic) elements: Bromine (Br 2 ) Iodine (I 2 ) Nitrogen (N 2 ) Chlorine (Cl 2 ) Hydrogen (H 2 ) Oxygen (O 2 ) Fluorine (F 2 ) When these elements are on their own, they bond to themselves. YOU MUST REMEMBER THIS!!!!!!!!!!!!!!!!!!!!!1
12 Types of Reactions Now let s talk about the types of chemical reactions. For this class, you ll need to know five of them: Combination (also known as Synthesis) Decomposition Single Replacement Double Replacement Combustion Let s take a look at them in chemistry terms as well as prom terms.
13 1: Synthesis + I told you they were together!
14 1. Combination (Synthesis) Reactions In combination/synthesis reactions, two or more chemicals combine to make a new compound. A + X AX Examples include: Reactions with oxygen and sulfur. Reactions of metals with halogens. Reactions with oxides.
15 2: Decomposition + Well we all saw that coming.
16 2. Decomposition Reactions In decomposition reactions, a single compound breaks down into two or more simpler substances. AX A + X Examples include: [metal]co 3 [metal]oxide + CO 2 [metal]oh [metal]oxide + H 2 O [metal]clo 3 [metal]chloride + O 2 Acids [nonmetal]oxide + H 2 O
17 3: Single Replacement + + Scandalous!
18 3. Single Replacement Reactions In single replacement reactions, a lone element takes the place of an element in a compound. A + BX AX + B BX + Y BY + X Examples include: Metals replacing metals. Hydrogen in water being replaced by a metal. Hydrogen in acid being replaced by a metal. Halogens being replaced by more reactive halogens.
19 Activity Series When we talked about Single Replacement Reactions, I mentioned more reactive halogens. As it turns out, elements (not just halogens) have varying degrees of reactivity. Chemists have created lists called Activity Series that detail how (in our class s case) metals and halogens react with one another, assuming they even react at all. Also known as Reactivity Series. Makes sense
20 Activity Series of Metals Metals can replace other metals if they re above the metal they re replacing. Metals can replace Hydrogen in acids if they re above Hydrogen. Metals can replace Hydrogen in water if they re above Magnesium.
21 Activity Series of Halogens A halogen can replace another halogen in a compound if it is above the one it s replacing. Example: 2NaCl (s) + F 2 (g) 2NaF (s) + Cl 2 (g) MgCl 2 (s) + Br 2 (g) NO REACTION Note that the halogen activity series is the same as the group order of halogens on the table.
22 Activity Series: Reaction or No? Cu + MgSO 4 Mg + CuSO 4 No reaction (Magnesium is above Copper). Pb + ZnSO 4 Zn + PbSO 4 No reaction (Zinc is above Lead). Fe + 2AgNO 3 2Ag + Fe(NO 3 ) 2 Reaction (Iron is above Silver). 2Al + 3H 2 O Al 2 O 3 + 3H 2 No reaction (Aluminum is not above Magnesium).
23 Single Replacement Technicalities* *Technically, this is important. When a Group I or Group II metal (alkali/alkaline earth) reacts with water, they only replace one of the hydrogens. Examples: K + H 2 O KOH + H 2 Mg + H 2 O Mg(OH) 2 + H 2 In other words, they form hydroxides, not oxides.
24 Aside: Coins There s an interesting phenomenon with pocket change relating to the Activity Series: Pennies tend to become very dull relatively quickly, yet quarters and other silvery coins tend not to. What s the deal? As it turns out, pennies are plated in copper, while other coins are plated in nickel. Because nickel is higher on the list, it s less likely to be replaced and thus tarnish. Copper, on the other hand, is a bit of a chemical weakling.
25 4: Double Replacement + + Gross!
26 4. Double Replacement Reactions In double replacement reactions, ions of two compounds flip places in aqueous solutions, forming two new compounds. AX + BY AY + BX Typically, one of the compounds formed is: A precipitate (a solid or a bubblin gas). A molecular compound (usually water). One of the compounds must be insoluble!
27 Reminder: Dissociation Bound ions in component ions out. Ca Cl Cl Ca 2+ Cl - Cl -
28 Predicting States of Matter Remember that double replacement reactions occur in solutions. To predict the states of matter resulting from a double replacement reaction, first write the equation. Then, use your solubility table. FYI, when they say salts involving, just think of it as saying ionic compounds involving FYI, when they say halides, just think of it as saying halogens
29 Solubility Example NiNO 3 (aq) + KBr (aq) KNO 3 (?) + NiBr (?) In what states are potassium nitrate and nickel (I) bromide? According to your solubility table: 1./2. All salts of Group IA and nitrates are soluble, so potassium nitrate is. 3. All salts of halides (halogens) are soluble, except so nickel (I) bromide is. NiNO 3 (aq) + KBr (aq) KNO 3 (aq) + NiBr (aq) So no reaction, since both of them are soluble. Remember, one must be insoluble!
30 Solubility Example Ba(NO 3 ) 2 (aq) + (NH 4 ) 3 PO 4 (aq) NH 4 NO 3 (?) + Ba 3 (PO 4 ) 2 (?) In what states are ammonium nitrate and barium phosphate? According to the solubility table, 1./2. All salts of ammonium and nitrates are soluble so ammonium nitrate is. 5. All salts of phosphate are insoluble except so barium phosphate is not. Ba(NO 3 ) 2 (aq) + (NH 4 ) 3 PO 4 (aq) NH 4 NO 3 (aq) + Ba 3 (PO 4 ) 2 (s) One compound is insoluble, so there will be a reaction.
31 Precipitates In the previous example, Ba 3 (PO 4 ) 2 fell out of solution. In other words, it took on a solid form and was no longer dissolved. We would expect it to collect at the bottom of the container. This is an example of precipitation, or the formation of a precipitate. A precipitate is a solid or gas substance that falls out of an aqueous solution. A precipitate could be water, but this is less common.
32 Precipitate Video/Demo KI (aq) + Pb(NO 3 ) 2 (aq) KNO 3 (?) + PbI 2 (?) Check your solubility tables for the phase of the two products. 1./2. All salts of Group IA and nitrates are soluble, so potassium nitrate is. 3. All salts of halides are soluble except those of lead (II), so lead (II) iodide is insoluble. KI (aq) + Pb(NO 3 ) 2 (aq) KNO 3 (aq) + PbI 2 (s) [Video]
33 5: Combustion + This one s hard to picture. Basically, oxygen reacts with something, usually releasing a lot of light and/or heat.
34 5. Combustion Reactions In combustion reactions, a substance reacts with oxygen, releasing a large amount of energy in the form of heat and light. When the reactants are only oxygen and a hydrocarbon, carbon dioxide and water are the products. Hydrocarbons are compounds made of only hydrogen, carbon, and/or oxygen. Examples include: C 3 H 8 (g) + 5O 2 (g) 3CO 2 (g) + 4H 2 O (g) P 4 (s) + 5O 2 (g) P 4 O 10 (s) This is a combustion and synthesis reaction!
35 Combustion Reaction Demo C 2 H 5 OH + 3O 2 2CO 2 + 3H 2 O
36 Aside: Great Moments in Science Meet Pilatre de Rozier: Mr. Rozier wanted to test the flammability of hydrogen, so he inhaled some, then exhaled over an open flame. Result? Singed eyebrows.
37 Identifying Chemical Reactions Let s practice identifying chemical reactions: Chemical Reactions Packet, Page 2, Upper Section Don t worry about balancing them yet.
38 Balancing Chemical Equations In addition to identifying chemical reactions, they also need to be balanced. According to the Law of Conservation of Mass/Matter, the mass of the reactants must equal the mass of the products. Atoms are conserved. So, all chemical formulas must show the same AMOUNTS OF ATOMS on both sides of the arrow. No elements can appear or disappear, either.
39 PhET Balancing Chemical Equations
40 Skeleton Equations Up till this point in the semester, sometimes we ve been writing equations that are not balanced, just to describe which elements are reacting. These unbalanced equations are called skeleton equations. Think bare bones equations. From now on, we ll need to balance our equations, so here are some directions.
41 How to Balance Chemical Equations Under the arrow, vertically list each element. Don t use any additional subscripts. Put a box around each term in the equation. Use coefficients to balance each side. NOT subscripts. Balance hydrogen second-to-last and oxygen last. How to remember this?
42 Balancing Chemical Equations Example 4 Al 2 + O 3 2 Al 2 2 O Al O 3 6
43 Important Note Keep in mind that, like in empirical formulas, the coefficients in a balanced equation should not be able to be reduced. In other words: 4Na + 2Cl 2 4NaCl should really be Na + Cl NaCl Even if it s balanced, it has to be reduced to the lowest ratio.
44 Balancing Synthesis Reactions 1 of 3 1. CaO + H 2 O Ca(OH) 2 CaO + H 2 O Ca(OH) 2 2. P 4 + O 2 P 2 O 5 P 4 + 5O 2 2P 2 O 5 3. Ca + O 2 CaO 2Ca + O 2 2CaO 4. Cu + S 8 CuS 8Cu + S 8 8CuS
45 Balancing Synthesis Reactions 2 of 3 5. S 8 + O 2 SO 2 S 8 + 8O 2 8SO 2 6. H 2 + N 2 NH 3 3H 2 + N 2 2NH 3 7. H 2 + Cl 2 HCl H 2 + Cl 2 2HCl 8. Ag + S 8 Ag 2 S 16Ag + S 8 8Ag 2 S
46 Balancing Synthesis Reactions 3 of 3 9. Cr + O 2 Cr 2 O 3 4Cr + 3O 2 2Cr 2 O Al + Br 2 AlBr 3 2Al + 3Br 2 2AlBr Na + I 2 NaI 2Na + I 2 2NaI 12. H 2 + O 2 H 2 O 2H 2 + O 2 2H 2 O
47 Balancing Decomposition Reactions 1 of 3 1. BaCO 3 BaO + CO 2 BaCO 3 BaO + CO 2 2. MgCO 3 MgO + CO 2 MgCO 3 MgO + CO 2 3. K 2 CO 3 K 2 O + CO 2 K 2 CO 3 K 2 O + CO 2 4. Zn(OH) 2 ZnO + H 2 O Zn(OH) 2 ZnO + H 2 O
48 Balancing Decomposition Reactions 2 of 3 5. Fe(OH) 2 FeO + H 2 O Fe(OH) 2 FeO + H 2 O 6. Ni(ClO 3 ) 2 NiCl 2 + O 2 Ni(ClO 3 ) 2 NiCl 2 + 3O 2 7. NaClO 3 NaCl + O 2 2NaClO 3 2NaCl + 3O 2 8. KClO 3 KCl + O 2 2KClO 3 2KCl + 3O 2
49 Balancing Decomposition Reactions 3 of 3 9. H 2 SO 4 H 2 O + SO 3 H 2 SO 4 H 2 O + SO H 2 CO 3 H 2 O + CO 2 H 2 CO 3 H 2 O + CO Al 2 O 3 Al + O 2 2Al 2 O 3 4Al + 3O Ag 2 O Ag + O 2 4Ag 2 O 2Ag + O 2
50 Balancing Single Replacement Reactions 1 of 2 1. AgNO 3 + Ni Ni(NO 3 ) 2 + Ag 2AgNO 3 + Ni Ni(NO 3 ) 2 + 2Ag 2. AlBr 3 + Cl 2 AlCl 3 + Br 2 2AlBr 3 + 3Cl 2 2AlCl 3 + 3Br 2 3. NaI + Br 2 NaBr + I 2 2NaI + Br 2 2NaBr + I 2 4. Ca + HCl CaCl 2 + H 2 Ca + 2HCl CaCl 2 + H 2
51 Balancing Single Replacement Reactions 2 of 2 5. Mg + HNO 3 Mg(NO 3 ) 2 + H 2 Mg + 2HNO 3 Mg(NO 3 ) 2 + H 2 6. Zn + H 2 SO 4 ZnSO 4 + H 2 Zn + H 2 SO 4 ZnSO 4 + H 2 7. K + H 2 O KOH + H 2 2K + 2H 2 O 2KOH + H 2 8. Na + H 2 O NaOH + H 2 2Na + 2H 2 O 2NaOH + H 2
52 Balancing Double Replacement Reactions 1 of 3 1. AlI 3 + HgCl 2 AlCl 3 + HgI 2 2AlI 3 + 3HgCl 2 2AlCl 3 + 3HgI 2 (s) 2. HCl + NaOH NaCl + H 2 O HCl + NaOH NaCl + H 2 O 3. BaCl 2 + H 2 SO 4 BaSO 4 + HCl BaCl 2 + H 2 SO 4 BaSO 4 + 2HCl 4. Al 2 (SO 4 ) 3 + Ca(OH) 2 Al(OH) 3 + CaSO 4 Al 2 (SO 4 ) 3 + 3Ca(OH) 2 2Al(OH) 3 + 3CaSO 4
53 Balancing Double Replacement Reactions 2 of 3 5. AgNO 3 + K 3 PO 4 Ag 3 PO 4 + KNO 3 3AgNO 3 + K 3 PO 4 Ag 3 PO 4 + 3KNO 3 6. CuBr 2 + AlCl 3 CuCl 2 + AlBr 3 3CuBr 2 + 2AlCl 3 3CuCl 2 + 2AlBr 3 7. Ca(C 2 H 3 O 2 ) 2 + Na 2 CO 3 CaCO 3 + NaC 2 H 3 O 2 Ca(C 2 H 3 O 2 ) 2 + Na 2 CO 3 CaCO 3 + 2NaC 2 H 3 O 2 8. NH 4 Cl + Hg 2 (C 2 H 3 O 2 ) 2 NH 4 C 2 H 3 O 2 + Hg 2 Cl 2 2NH 4 Cl + Hg 2 (C 2 H 3 O 2 ) 2 2NH 4 C 2 H 3 O 2 + Hg 2 Cl 2
54 Balancing Double Replacement Reactions 3 of 3 9. Ca(NO 3 ) 2 + HCl CaCl 2 + HNO 3 Ca(NO 3 ) 2 + 2HCl CaCl 2 + 2HNO FeS + HCl FeCl 2 + H 2 S FeS + 2HCl FeCl 2 + H 2 S 11. Cu(OH) 2 + HC 2 H 3 O 2 Cu(C 2 H 3 O 2 ) 2 + H 2 O Cu(OH) 2 + 2HC 2 H 3 O 2 Cu(C 2 H 3 O 2 ) 2 + 2H 2 O 12. Ca(OH) 2 + H 3 PO 4 Ca 3 (PO 4 ) 2 + H 2 3Ca(OH) 2 + 2H 3 PO 4 Ca 3 (PO 4 ) 2 + 6H 2
55 Balancing Combustion Reactions 1 of 3 1. CH 4 + O 2 CO 2 + H 2 O CH 4 + 2O 2 CO 2 + 2H 2 O 2. C 2 H 6 + O 2 CO 2 + H 2 O 2C 2 H 6 + 7O 2 4CO 2 + 6H 2 O 3. C 3 H 8 + O 2 CO 2 + H 2 O C 3 H 8 + 5O 2 3CO 2 + 4H 2 O
56 Balancing Combustion Reactions 2 of 3 4. C 4 H 10 + O 2 CO 2 + H 2 O 2C 4 H O 2 8CO H 2 O 5. C 5 H 12 + O 2 CO 2 + H 2 O C 5 H O 2 5CO 2 + 6H 2 O 6. C 6 H 14 + O 2 CO 2 + H 2 O 2C 6 H O 2 12CO H 2 O
57 Balancing Combustion Reactions 3 of 3 7. C 2 H 4 + O 2 CO 2 + H 2 O C 2 H 4 + 3O 2 2CO 2 + 2H 2 O 8. C 2 H 2 + O 2 CO 2 + H 2 O 2C 2 H 2 + 5O 2 4CO 2 + 2H 2 O 9. C 6 H 6 + O 2 CO 2 + H 2 O 2C 6 H O 2 12CO 2 + 6H 2 O
58 Balancing Equations Practice Chemical Reactions Packet (key online) You must complete at least 3 problems in every section on this packet (except page 4). You must score 30 points or higher: Page 1, Upper Section: 1 point each Page 1, Lower Section: 2 points each Page 2, Upper Section: 1 point each Page 2, Lower Section: 2 points each Includes Page 3 must have states of matter.
59 Combustion Reaction Details Chemical Reactions Packet, Page 4
60 Predicting Products Here s a little conceptual question: If methane (CH 4 ) combusts, what are the reactants and what are the products? Since combustion reactions always use oxygen gas as a reactant and form water and carbon dioxide as products (if the other reactant is a hydrocarbon), the skeleton equation would look like this: Skeleton: CH 4 + O 2 CO 2 + H 2 O Balanced: CH 4 + 2O 2 CO 2 + 2H 2 O
61 Predicting Products In addition to just spotting the type of reaction, it s good to be able to predict the products of a reaction. Here s a website to help: actice_predicting.html Also linked on my Chemistry Links page.
62 Predicting Products BIG HINTS Don t worry about subscripts when predicting products. Figure out who s together and/or who s alone. THEN write subscripts. Also, don t forget the diatomic (BrINClHOF) elements. Finally, make sure you re replacing cations with cations (written first) and anions with anions (written second).
63 Reaction Type Summary + Synthesis Decomposition + O 2 Combustion + Single Replacement + Double Replacement
64 Quick Interlude What kind of reaction is this? C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O That s right, it s combustion, since oxygen is a reactant. Notice also that since we are combusting a hydrocarbon, the products are water and carbon dioxide. Most importantly, what is this reaction? Yep, it s cellular respiration. You know, the thing all your cells, and nearly all cells everywhere, are doing right now? Your body runs off combustion! That s why they call it burning Calories.
65 More Predicting Products Practice Now for reactions other than combustion: Equations Worksheet, Lower Section First, just figure out the type of reaction. Then predict the products. Then balance. Predict the Products worksheet
66 Closure ml Also linked on my Chemistry Links page. You may try 5, 10, or 15 questions (let s go with 15 for today), and you may set the difficulty at easy, intermediate, or hard. Your goal is to do 15 easy questions, 15 intermediate questions, and 15 hard questions. Let me know when you re done.
Today is Friday (!), April 20 th, 2018
In This Lesson: Chemical Reactions (Lesson 3 of 4) Today is Friday (!), April 20 th, 2018 Pre-Class: What s that? Today s Agenda Where we are and where we ve been. Chemical Reactions Balancing Chemical
More informationBALANCING EQUATIONS NOTES
BALANCING EQUATIONS NOTES WHY DO WE NEED TO BALANCE CHEMICAL EQUATIONS? The LAW OF CONSERVATION OF MASS says that matter cannot be created or destroyed. In other words, you cannot end up with any more
More informationReaction Writing Sheet #1 Key
Reaction Writing Sheet #1 Key Write and balance each of the following reactions and indicate the reaction type(s) present: 1. zinc + sulfur zinc sulfide 8 Zn (s) + S 8 (s) 8 ZnS (s) synthesis 2. potassium
More informationUnit 1 - Foundations of Chemistry
Unit 1 - Foundations of Chemistry Chapter 2 - Chemical Reactions Unit 1 - Foundations of Chemistry 1 / 42 2.1 - Chemical Equations Physical and Chemical Changes Physical change: A substance changes its
More informationBalancing Equations Notes
. Unit 6 Chemical Equations and Reactions What is a Chemical Equation? A Chemical Equation is a written representation of the process that occurs in a chemical reaction. A chemical equation is written
More informationCHEMICAL REACTIONS. Introduction. Chemical Equations
CHEMICAL REACTIONS Chemistry I Chapter 7 1 Chemical Equations Their Job: Depict the kind of reactants and products and their relative amounts in a reaction. 4 Al (s) + 3 O 2 (g) ---> 2 Al 2 O 3 (s) The
More informationUnit Learning Targets (L.T.):
Unit 9: Chemical Equations and Reactions Chapters 8 and 19 Name Block Unit Learning Targets (L.T.): By the end of the unit, students will be able to: Chapter 8: 1. Correctly write and balance chemical
More informationBalancing Equations Notes
. Unit 9 Chemical Equations and Reactions What is a Chemical Equation? A Chemical Equation is a written representation of the process that occurs in a chemical reaction. A chemical equation is written
More informationCHEMICAL REACTION. Engr. Yvonne Ligaya F. Musico 1
CHEMICAL REACTION Engr. Yvonne Ligaya F. Musico 1 Chemical Reaction Engr. Yvonne Ligaya F. Musico 2 Introduction Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken
More informationChemical Reactions. Burlingame High School Chemistry 1
Chemical Reactions 1 Chemical Equations Chemical equations are use to describe: the substances that react, the reactants the substances that are formed, the products the relative amounts of all substances
More informationUnit 5: Chemical Equations and Reactions & Stoichiometry
pg. 10 Unit 5: Chemical Equations and Reactions & Stoichiometry Chapter 8: Chemical Equations and Reactions 8.1: Describing Chemical Reactions Selected Chemistry Assignment Answers (Section Review on pg.
More informationBalancing Equations Notes
. Unit 9 Chemical Equations and Reactions What is a Chemical Equation? A is a written representation of the process that occurs in a chemical reaction. A chemical equation is written with the (starting
More informationCHAPTER Describing Chemical Reactions Reactants Products. New substances produced The arrow means yields TYPES OF EQUATIONS.
CHAPTER 11 Chemical Reactions 11.1 Describing Chemical Reactions Reactants Products New substances produced The arrow means yields Where do Chemical Reactions occur? Everywhere!!! In living organisms In
More informationChemical Reactions. Ch. 11 Chemical Reactions. Chemical Reactions. Chemical Reactions
Chemical Reactions Ch. 11 Chemical Reactions when a substance changes identity Reactants - original Products - resulting law of conservation of mass total mass of reactants = total mass of products In
More informationChemical Equations and Chemical Reactions
Chemical Equations Chemical Equations and Chemical Reactions Chemical equations are concise representations of chemical reactions. Chemical Equations Symbols Used in Chemical Equations The formulas of
More informationCHEMICAL REACTIONS. Types of Reactions. Steps to Writing Reactions
Types of Reactions CHEMICAL REACTIONS There are five types of chemical reactions we will talk about: 1. Synthesis reactions 2. reactions 3. Single displacement reactions 4. reactions 5. Combustion reactions
More informationTypes of Reactions. There are five types of chemical reactions we observed in the lab:
Chemical Reactions Acids and Bases Acids: Form hydrogen ions (H + ) when dissolved in water. HCl (aq) H + (aq) + Cl - (aq) Examples: HCl (hydrochloric acid), HNO 3 (nitric acid), H 2 SO 4 (sulfuric acid),
More informationCHEMICAL REACTIONS WORDS, SYMBOLS AND ABBREVIATIONS
CHEMICAL REACTIONS All chemical reactions have two parts: (1) A substance that undergoes a reaction is called a. In other words, reactants are the substances you start with. (2) When reactants undergo
More information2. Indicators of Chemical Rxns. Abbreviations of State (g) gas (l) liquid (s) solid (aq) aqueous a substance dissolved in water
Unit 6 Chemical Reactions 1. Parts of a Chemical Reaction 2. Indicators of a Chemical Reaction 3. Enthalpy 4. Balancing Chemical Equations 5. Word Equations 6. Classifying Chemical Reactions 7. Predicting
More informationSCH 3UI Unit 5 Outline Chemical Reactions Homework Questions and Assignments complete handouts: Balancing Equations #1, #2, #3, #4
Lesson Topics Covered 1 Note: Chemical Reactions and Chemical Equations definition of chemical reaction four signs of chemical change the Law of Conservation of Mass balancing chemical equations SCH 3UI
More informationChapter 8 Chemical Reactions
Chemistry/ PEP Name: Date: Chapter 8 Chemical Reactions Chapter 8: 1 7, 9 18, 20, 21, 24 26, 29 31, 46, 55, 69 Practice Problems 1. Write a skeleton equation for each chemical reaction. Include the appropriate
More informationBalancing CHEMICAL EQUATIONS
Balancing CHEMICAL EQUATIONS CHEMICAL REACTIONS involves a chemical change in the identity of one or more chemical species Ex. Rusting of iron (Fe): chemical rxn btwn water and iron involve the breaking
More informationTypes of Reactions. There are five main types of chemical reactions we will talk about:
Chemical Reactions Types of Reactions There are five main types of chemical reactions we will talk about: 1. Synthesis reactions 2. Decomposition reactions 3. Single displacement reactions 4. Double displacement
More informationChapter 9. Vocabulary Ch Kick Off Activity. Objectives. Interpreting Formulas. Interpreting Formulas
Chapter 9 Chemical Vocabulary Ch. 9.1 Chemical reaction Reactant Product Word Equation Skeleton Equation Chemical equation Coefficient 1 2 Objectives Write chemical equations to describe chemical reactions
More informationChemical Reactions and Equations Types of Reactions Predicting Products Activity Series Identifying Oxidation-Reduction Reactions
Chemical Reactions and Equations Types of Reactions Predicting Products Activity Series Identifying Oxidation-Reduction Reactions A preview of things we will do Chemical Reactions are AWESOME! Characteristics
More informationIntroduction to Chemical Reactions. Making new substances
Introduction to Chemical Reactions Making new substances Main Ideas Chemical Reactions are represented by Chemical Equations. Chemical Equations are balanced to show the same number of atoms of each element
More informationWhat Do You Think? Investigate GOALS
Cool Chemistry Show Activity 4 Chemical Equations GOALS In this activity you will: Represent chemical changes using word equations and chemical equations. Distinguish between different classes of chemical
More informationChemical Reactions and Equations
Chemical Reactions and Equations 5-1 5.1 What is a Chemical Reaction? A chemical reaction is a chemical change. A chemical reaction occurs when one or more substances is converted into one or more new
More informationBalancing Equations Notes
. Unit 7 Chemical Equations and Reactions What is a Chemical Equation? A is a written representation of the process that occurs in a chemical reaction. A chemical equation is written with the (starting
More information1. Parts of Chemical Reactions. 2 H 2 (g) + O 2 (g) 2 H 2 O(g) How to read a chemical equation
Unit 6 Chemical Reactions 1. Parts of a Chemical Reaction 2. Indicators of a Chemical Reaction 3. Enthalpy 4. Balancing Chemical Equations 5. Word Equations 6. Classifying Chemical Reactions 7. Predicting
More informationBICOL UNIVERSITY. College of Science Department of Chemistry. CHEM 1 GENERAL CHEMISTRY LECTURE HANDOUT Ver. 1.1 α
BICOL UNIVERSITY College of Science Department of Chemistry CHEM 1 GENERAL CHEMISTRY LECTURE HANDOUT Ver. 1.1 α 20110307 1 mole = 6.022 x 10 23 of molecules (Avogadro's number) A mole is similar to a term
More informationHW 7 KEY!! Chap. 7, #'s 11, 12, odd, 31, 33, 35, 39, 40, 53, 59, 67, 70, all, 77, 82, 84, 88, 89 (plus a couple of unassigned ones)
HW 7 KEY!! Chap. 7, #'s 11, 12, 15-21 odd, 31, 33, 35, 39, 40, 53, 59, 67, 70, 72-75 all, 77, 82, 84, 88, 89 (plus a couple of unassigned ones) 11) NOTE: I used the solubility rules that I have provided
More information8 Chemical Equations. Flames and sparks result when aluminum foil is dropped into liquid bromine.
8 Chemical Equations Flames and sparks result when aluminum foil is dropped into liquid bromine. Chapter Outline 8.1 The Chemical Equation 8.2 Writing and Balancing Chemical Equations 8.3 Types of Chemical
More informationYou have mastered this topic when you can: CHEMICAL REACTIONS AND THE KINETIC MOLECULAR THEORY AQUEOUS SOLUTIONS
CH 11 TOPIC 32 CLASSIFYING CHEMICAL REACTIONS PART 2 1 You have mastered this topic when you can: 1) define or describe these terms: aqueous solution, solvent, solute, solubility, soluble, low solubility,
More informationAqueous Reactions. The products are just the cation-anion pairs reversed, or the outies (A and Y joined) and the innies (B and X joined).
Aqueous Reactions Defining Aqueous Reactions Aqueous reactions are reactions that take place in water. To understand them, it is important to understand how compounds behave in water. Some compounds are
More informationQuestion 8 Chemical properties of metals and nonmetals. 1) magnesium 2) sulfur trioxide 3) iron (II) hydroxide 4) sodium nitrate
Question 8 Chemical properties of metals and nonmetals 1. Calcium oxide doesn t react with 1) NaNO 3 2) HCl 3) CO 2 4) H 2 O 2. Calcium oxide reacts with both of the following 1) SO 2 and O 2 2) H 2 O
More informationTypes of Chemical Reactions (rxns.)
Types of Chemical Reactions (rxns.) Introduction Chemical reactions occur when bonds (between the electrons of atoms) are formed or broken Chemical reactions involve changes in the chemical composition
More informationUnit 6. Chemical Reactions
Unit 6 Chemical Reactions Physical Vs. Chemical Change Physical changes= changes in form (phase), but not the identity of the substance ex: H 2 O (s) H 2 O (l) (* Starts as H 2 O and ends as H 2 O) Chemical
More informationCHEMICAL REACTIONS. Discuss breaking/forming bonds 10/29/2012. Products Reactants
CHEMICAL REACTIONS - Page 321 Products Reactants Reactants: Zn + I 2 Product: Zn I 2 Discuss breaking/forming bonds Chemical Reaction or Change process in which one or more substances are converted into
More informationChem A Ch. 9 Practice Test
Name: Class: Date: Chem A Ch. 9 Practice Test Matching Match each item with the correct statement below. a. product d. balanced equation b. reactant e. skeleton equation c. chemical equation 1. a new substance
More information11.3 Reactions in Aqueous Essential Understanding Reactions that occur in aqueous solutions are double-replacement
13. Is the following sentence true or false? Hydrocarbons, compounds of hydrogen and carbon, are often the reactants in combustion reactions. 14. Circle the letter of each compound that can be produced
More informationChapter 9. Chemical Reaction
Chapter 9 Chemical Reaction Everyday Chemical Reaction O Can you name some? O Cooking Pizza O Changes the ingredients O Combustion O Driving to school burns gasoline O Wheelbarrow rusting (especially in
More informationName: 1. Law of Conservation of Mass atoms going into the reaction (reactants) must equal atoms coming out of the reaction (products)
Unit 8: Balancing and Identifying Chemical Reactions Packet Name: 1. Law of Conservation of Mass atoms going into the reaction (reactants) must equal atoms coming out of the reaction (products) C O 2 CO
More informationCHEMICAL REACTIONS. The process by which one or more substances are changed into one or more different substances
CHEMICAL REACTIONS The process by which one or more substances are changed into one or more different substances Equations Reactions are represented by a chemical equation Reactants Products Must have
More informationUnit 8 Chemical Reactions- Funsheets
Part A- Balancing Equations and Types of Reactions Balance AND identify the following reactions: Unit 8 Chemical Reactions- Funsheets 1) Mg + Zn(NO 3) 2 Zn Mg(NO 3) 2 2) Ba + AgNO 3 Ag + Ba(NO 3) 2 3)
More informationChemical Reactions. All chemical reactions can be written as chemical equations.
Chemical Reactions All chemical reactions can be written as chemical equations. What is a Chemical Reaction? Chemical reactions represent chemical changes A chemical change occurs when a substance has
More informationChemical Reaction Defn: Chemical Reaction: when starting chemical species form different chemicals.
Chemistry 11 Notes on Chemical Reactions Chemical Reaction Defn: Chemical Reaction: when starting chemical species form different chemicals. Evidence to indicate that a chemical reaction has occurred:
More informationChemical Reactions
http://www.youtube.com/watch?v=hgn7ase8e6w&sns=em Chemical Reactions Agenda Day 39- Types of Chemical Reactions- Synthesis and Decomposition Lesson: PPT- Synthesis and decomposition Assign OBS. Table
More informationPHOTOSYNTHESIS as a chemical reaction
CHEMICAL REACTIONS PHOTOSYNTHESIS as a chemical reaction SUNLIGHT CO 2 + H 2 O C 6 H 12 O 6 + O 2 REACTANTS PRODUCTS REACTANTS are the ingredients of a chemical reaction, always listed to the left of the
More informationChemical Reaction Defn: Chemical Reaction: when starting chemical species form different chemicals.
Chemical Reaction Defn: Chemical Reaction: when starting chemical species form different chemicals. Evidence to indicate that a chemical reaction has occurred: Temperature change Different coloured materials
More information11-1 Notes. Chemical Reactions
11-1 Notes Chemical Reactions Chemical Reactions In a chemical reaction 1 or more substances (the reactants) change into 1 or more new substances (the products). Reactants are always written on the left
More informationChemical Reactions Unit
Name: Hour: Teacher: ROZEMA / Chemistry Chemical Reactions Unit 1 P a g e 2 P a g e 3 P a g e 4 P a g e 5 P a g e 6 P a g e Chemistry Balancing Equations Balance the following equations by inserting the
More informationChapter 8. Chemical Equations. Flames and sparks result when aluminum foil is dropped Into liquid bromine.
Chapter 8 Chemical Equations Flames and sparks result when aluminum foil is dropped Into liquid bromine. Introduction to General, Organic, and Biochemistry 10e John Wiley & Sons, Inc Morris Hein, Scott
More informationHonors Chemistry - Unit 7 Chapter 11 Chemical Reactions
Honors Chemistry - Unit 7 Chapter 11 Chemical Reactions Vocab Assignment Due: Unit 7 Packet - Page 1 of 15 UT Quest(s): Quiz on Diatomic Molecules & Balancing: Prediction Quiz : Test Date: VOCABULARY Assignment
More informationUNIT (4) CALCULATIONS AND CHEMICAL REACTIONS
UNIT (4) CALCULATIONS AND CHEMICAL REACTIONS 4.1 Formula Masses Recall that the decimal number written under the symbol of the element in the periodic table is the atomic mass of the element. Atomic mass
More informationChemical Reactions. Chemical Reactions 5 signs/evidence of chemical reactions:
Chemical Reactions Chemical Reactions 5 signs/evidence of chemical reactions: Chemical Reaction: a process in which one or more substances are converted into new substances with different chemical and
More informationIndicators of chemical reactions
Indicators of chemical reactions Emission of light or heat Formation of a gas Formation of a precipitate Color change Emission of odor All chemical reactions: have two parts Reactants - the substances
More informationThe photograph in the textbook provides evidence that an exothermic chemical reaction is occurring.
Preview Lesson Starter Objectives Indications of a Chemical Reaction Characteristics of Chemical Equations Significance of a Chemical Equation Balancing Chemical Equations Section 1 Describing Chemical
More information1) What is the volume of a tank that can hold Kg of methanol whose density is 0.788g/cm 3?
1) Convert the following 1) 125 g to Kg 6) 26.9 dm 3 to cm 3 11) 1.8µL to cm 3 16) 4.8 lb to Kg 21) 23 F to K 2) 21.3 Km to cm 7) 18.2 ml to cm 3 12) 2.45 L to µm 3 17) 1.2 m to inches 22) 180 ºC to K
More informationChemical Reaction Types
Chemical Reactions Chemical Reaction Types There are 5 types of chemical reactions that you need to know Combination reaction Decomposition reaction Combustion reaction Single replacement (redox) reaction
More informationPractice Packet Unit 3: Moles & Stoichiometry
PRACTICE PACKET: Unit 3 Moles & Stoichiometry Regents Chemistry: Mr. Palermo Practice Packet Unit 3: Moles & Stoichiometry Vocabulary: Lesson 1: Lesson 2: Lesson 3: Lesson 4: Lesson 5: Lesson 6: Lesson
More informationCHAPTER 8 CHEMICAL REACTIONS AND EQUATIONS
CHAPTER 8 CHEMICAL REACTIONS AND EQUATIONS CHEMICAL REACTIONS Occurs when matter combines or breaks apart to produce new kinds of matter with different properties with a change in energy. EVIDENCE FOR
More informationReaction Types and Chemical Equations
Cool Chemistry Show Section 4 Reaction Types and Chemical Equations What Do You See? Learning Outcomes In this section you will Represent chemical changes using word equations and chemical equations. Distinguish
More information2) Solve for protons neutrons and electrons for the bromide ION.
1) Write the formulas for the following a) Calcium nitride c)lithium hydroxide b) Iron (III) sulfide d) sulfuric acid 2) Solve for protons neutrons and electrons for the bromide ION. 3) Write the electron
More informationNihal İKİZOĞLU 1. TYPE of CHEMICAL REACTIONS. Balance the following chemical equations. 1. Fe + H 2 SO 4 Fe 2 (SO 4 ) 3 + H 2
TYPE of CHEMICAL REACTIONS Balance the following chemical equations. 1. Fe + H 2 SO 4 Fe 2 (SO 4 ) 3 + H 2 2. C 2 H 6 + O 2 H 2 O + CO 2 3. KOH + H 3 PO 4 K 3 PO 4 + H 2 O 4. SnO 2 + H 2 Sn + H 2 O 5.
More informationName Date Class CHEMICAL REACTIONS. SECTION 11.1 DESCRIBING CHEMICAL REACTIONS (pages )
Name Date Class 11 CHEMICAL REACTIONS SECTION 11.1 DESCRIBING CHEMICAL REACTIONS (pages 321 329) This section explains how to write equations describing chemical reactions using appropriate symbols. It
More informationUnit 6.3 Types of Chemical reactions
Unit 6.3 Types of Chemical reactions Most chemical reactions can be classified into one of five types of reactions. It depends on both the reactants used and the products formed. The possible chemical
More informationChemical Reactions Chapter 11 Study Guide (Unit 8)
Name: Hr: Understand and be able to explain all of the key concepts. Define and understand all of the survival words Memorize the names and symbols for these elements: (Ag, Al, Ar, As, Au, B, Ba, Be, Br,
More informationUnit 5 Chemical Reactions Notes. Introduction: Chemical substances have physical and chemical properties
Unit 5 Chemical Reactions Notes Introduction: Chemical substances have physical and chemical properties Physical Properties 2 Types of Physical Properties Extensive Physical Properties Intensive Physical
More informationFunsheet 3.0 [WRITING & BALANCING EQUATIONS] Gu/R. 2017
Funsheet 3.0 [WRITING & BALANCING EQUATIONS] Gu/R. 2017 Balance the following chemical equations. Remember, it is not necessary to write "1" if the coefficient is one. 1. N 2 + H 2 NH 3 2. KClO 3 KCl +
More informationFrom Writing Formulas to Balancing Equations A Tutorial
Chemistry Revised 2013 Name From Writing Formulas to Balancing Equations A Tutorial Period Oxidation Numbers. The Oxidation numbers written as s _ tell whether an element or group of elements lost or gained
More informationEvidence of a chemical reaction: heat, light, sound, gas emitted, color change, odor
Unit 7: Chemical Equations Evidence of a chemical reaction: heat, light, sound, gas emitted, color change, odor A reaction has occurred if the chemical and physical properties of the reactants and products
More informationName: Date: Period: Page: Balancing Equations
Name: Date: Period: Page: Balancing Equations In a chemical reaction, one or more reactants change into one or more products. Chemists use chemical equations as a quick shorthand notation to convey as
More informationBroughton High School
Name: Section: Chapter 21 Chemical Reactions Vocabulary Words 1. Balanced Chemical Reactions 2. Catalyst Broughton High School 3. Chemical Equation 4. Chemical Reaction 5. Coefficient 6. Combustion Reaction
More informationUnit IV: Chemical Equations & Stoichiometry
Unit IV: Chemical Equations & Stoichiometry A. The chemical equation B. Types of chemical reactions A. Activity series of metals B. Solubility rules C. Rules for writing and balancing equations D. Calculations
More informationNotes: Chemical Reactions. Diatomic elements: H 2, N 2, O 2, F 2, Cl 2, Br 2, I 2 I Bring Clay For Our New Hut OR HOBrFINCl
Name Chemistry-PreAP Notes: Chemical Reactions Period Review: Some elements do not occur as single atoms when uncombined with other elements. They will bond with themselves, forming a molecule. In any
More informationChapter 5 Classification and Balancing of Chemical Reactions
Chapter 5 Classification and Balancing of Chemical Reactions 5.1 Chemical Equations Chemical equations describe chemical reactions. - As words: hydrogen plus oxygen combine to form water - As a chemical
More informationIntro to Reactions/ Balancing Equations
Intro to Reactions/ Balancing Equations Chemical Reactions Chemical reactions involve change. Evidence of a chemical reaction could include the following Evolution of heat, light, and/or sound Production
More informationMoles. Balanced chemical equations Molar ratios Mass Composition Empirical and Molecular Mass Predicting Quantities
Moles Balanced chemical equations Molar ratios Mass Composition Empirical and Molecular Mass Predicting Quantities Micro World atoms & molecules Macro World grams Atomic mass is the mass of an atom in
More informationc. Methane and oxygen react to form carbon dioxide and water
Name: Date: Period: REVIEW CHAPTERS 10 AND 18 1. Identify the type of each of the following reactions: a. 2Mg + O 2 2 MgO Synthesis b. Fe + CuSO 4 FeSO 4 + Cu Single-Replacement (SR) c. CaCO 3 CaO + CO
More informationWRITING CHEMICAL EQUATIONS 2002, 1989 by David A. Katz. All rights reserved. Permission for classroom used provided original copyright is included.
WRITING CHEMICAL EQUATIONS 2002, 1989 by David A. Katz. All rights reserved. Permission for classroom used provided original copyright is included. David A. Katz Chemist, Educator, Science Communicator,
More informationCh 7 Chemical Reactions Study Guide Accelerated Chemistry SCANTRON
Ch 7 Chemical Reactions Study Guide Accelerated Chemistry SCANTRON Name /80 TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. Correct the False statments by changing the
More informationChapter 6. Chemical Reactions. Sodium reacts violently with bromine to form sodium bromide.
Chapter 6 Chemical Reactions Sodium reacts violently with bromine to form sodium bromide. Evidence of Chemical Reactions Chemical Equations Reactants Products Reactant(s): Substance(s) present before the
More information(DO NOT WRITE ON THIS TEST)
Final Prep Chap 8&9 (DO NOT WRITE ON THIS TEST) Multiple Choice Identify the choice that best completes the statement or answers the question. 1. After the correct formula for a reactant in an equation
More information5072 CHEMISTRY (NEW PAPERS WITH SPA) BASIC TECHNIQUES 5067 CHEMISTRY (NEW PAPERS WITH PRACTICAL EXAM) BASIC TECHNIQUES
5072 CHEMISTRY (NEW PAPERS WITH SPA) BASIC TECHNIQUES 5067 CHEMISTRY (NEW PAPERS WITH PRACTICAL EXAM) BASIC TECHNIQUES LEARNING OUTCOMES a) Be able to write formulae of simple compounds b) Be able to write
More informationUNIT III: SOLUBILITY EQUILIBRIUM YEAR END REVIEW (Chemistry 12)
I. Multiple Choice UNIT III: SOLUBILITY EQUILIBRIUM YEAR END REVIEW (Chemistry 12) 1) Which one of the following would form an ionic solution when dissolved in water? A. I 2 C. Ca(NO 3 ) 2 B. CH 3 OH D.
More informationelemental state. There are two different possibilities: DESCRIPTION 1. One cation (+ ion) replaces another. 2. One anion (- ion) replaces another.
CHEMICAL TYPES HANDOUT In these reactions, a free element reacts with a compound to form another compound and release one of the elements of the original compound in the elemental state. There are two
More informationUnit 5. Chemical reactions
Unit 5. Chemical reactions Index 1.- Physical and chemical phenomena...2 2.- What is a chemical reaction?...2 2.1. Chemical equation...2 2.2.- Balance of chemical reactions. Law of conservation of mass...3
More informationCHAPTER 11: CHEMICAL REACTIONS. Mrs. Brayfield
CHAPTER 11: CHEMICAL REACTIONS Mrs. Brayfield WRITING EQUATIONS Write the chemical equation for the following: Magnesium metal reacts with hydrochloric acid to form aqueous magnesium chloride and hydrogen
More informationThe names of the reactants are: The names of the products are: The name of the product is:
CLASSIFICATION OF EQUATIONS WORKSHEET Chemical reactions produce new substances with new properties. The starting materials in a chemical reaction are called reactants while the materials that are formed
More informationUNIT 12: Solutions Lesson 3: Table F Solubility Guidelines
Name: Period: Date: General Chemistry KIPP NYC College Prep UNIT 12: Solutions Lesson 3: Table F Solubility Guidelines By the end of today, you will have an answer to: How do we determine if a substance
More informationThe solvent is the dissolving agent -- i.e., the most abundant component of the solution
SOLUTIONS Definitions A solution is a system in which one or more substances are homogeneously mixed or dissolved in another substance homogeneous mixture -- uniform appearance -- similar properties throughout
More informationTypes of Chemical Reactions
Why? Types of Chemical Reactions Do atoms rearrange in predictable patterns during chemical reactions? Recognizing patterns allows us to predict future behavior. Weather experts use patterns to predict
More informationChemical Equations. Chemical Reactions. The Hindenburg Reaction 5/25/11
Chemical Reactions CHM 1032C Chemical Equations Chemical change involves a reorganization of the atoms in one or more substances. The Hindenburg Reaction Reactants are on left, products to the right. Arrow
More information7.01 Chemical Reactions
7.01 Chemical Reactions The Law of Conservation of Mass Dr. Fred Omega Garces Chemistry 100 Miramar College 1 Chemical Reactions Making Substances Chemical Reactions; the heart of chemistry is the chemical
More informationHonors Chemistry - Unit 5 Chapter 8 Chemical Equations Quiz on Diatomic Molecules: Tues., Nov. 15th Test Date: Fri., Nov. 26th
Honors Chemistry - Unit 5 Chapter 8 Chemical Equations Quiz on Diatomic Molecules: Tues., Nov. 15th Test Date: Fri., Nov. 26th VOCABULARY Assignment Use the Two-column Notes format/strategy to study/complete
More informationElectrodeposition. - Worksheet - Envisioning Chemistry. 1. Write half reactions for the following processes under electrical current.
Electrodeposition 1. Write half reactions for the following processes under electrical current. (1). Formation of copper from copper (II) ion Example: Cu 2+ + 2e --> Cu (2). Formation of tin from tin ion
More informationBONDING AND BALANCING
BONDING AND BALANCING Physical Science Spring 2017 NAME: CLASS PERIOD: TEACHER: ASSIGNMENT PAGE NUMBERS DUE DATE HW POINTS EARNED LAB POINTS EARNED Learning Targets: Chemical Bonding 1-2 Atomic Structure
More informationUnit 4. Multiple Choice Identify the choice that best completes the statement or answers the question.
Unit 4 Multiple Choice Identify the choice that best completes the statement or answers the question. 39. Changing a subscript in a correctly written chemical formula a. changes the number of moles represented
More informationUnit 5: Chemical Reactions. Chapter 11
Unit 5: Chemical Reactions Chapter 11 Objectives 35 Identify the five types of chemical reactions 36 Write word and chemical equations based on chemical reactions 37 Balance chemical equations 38 Predict
More information