Identify the reaction type, predict the products, and balance the equations. If it is a special decomposition or synthesis, identify which kind.

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1 Identify the reaction type, predict the products, and balance the equations. If it is a special decomposition or synthesis, identify which kind. 1. calcium + oxygen 2. cupric carbonate 3. aluminum + hydrochloric acid 4. potassium iodide + chlorine 5. barium chloride + sodium sulfate 6. copper + silver nitrate cupric nitrate 7. barium hydroxide + sulfuric acid 8. zinc sulfate + ammonium sulfide 9. sodium + water 10. magnesium + sulfuric acid

2 Chemical Equations 1. The actual knowledge about what products are produced in a chemical reaction is obtained by a. inspecting the chemical equation b. balancing the chemical equation c. laboratory analysis d. writing a word equation 2. Once the correct formula for a reactant in an equation has been written, the a. subscripts are adjusted to balance the equation b. formula should not be changed c. same formula must appear as a product d. symbols used in the formula must not be used on the product side of the equation 3. In writing an equation in which hydrogen gas appears as a product, the correct representation of hydrogen gas is a. H b. 2 H c. H 2 d. OH 4. In a chemical equation, the symbol is read a. aqueous b. goes c. yields d. points 5. In a chemical equation, the symbol is used for a(n) a. heated reactant b. gaseous reactant c. catalyst d. gaseous product 6. How would oxygen be represented in the formula equation for the reaction between methane (CH 4 ) and oxygen to yield carbon dioxide and water? a. oxygen b. O c. O 2 d. O 3 7. What is the ratio of hydrogen to chlorine in the equation H 2(g) + Cl 2(g) 2 HCl (g)? a. 1:2 b. 2:1 c. 1:1 d. 4:2 8. Balanced formula equations express all of the following EXCEPT a. experimentally established facts b. mechanisms by which reactants become restructured into products c. identities of reactants and products in a chemical system d. relative quantities of reactants and products in the system

3 9. A reversible reaction is indicated by a. a capital R b. a lower-case r c. an up and down arrow d. two yield symbols pointing in opposite directions 10. When the equation Fe 3 O 4 + Al Al 2 O 3 + Fe is correctly balanced, the coefficient of Fe is a. 3 b. 4 c. 6 d In a chemical equation, the symbol (s) indicated that the substance is a(n).

4 Types of Chemical Reactions 1. The reaction 2 Mg (s) + O 2(g) 2 MgO (s) is an example of a(n) a. synthesis reaction b. decomposition reaction c. single displacement reaction d. double displacement reaction 2. The reaction Mg (S) + HCl (aq) H 2 + MgCl 2(aq) is an example of a(n) a. combustion reaction b. decomposition reaction c. single displacement reaction d. double displacement reaction 3. 2 HgO (s) 2 Hg (l) + O 2 is an example of a(n) a. single displacement reaction b. synthesis reaction c. ionic reaction d. decomposition reaction 4. In one type of synthesis reaction, an element combines with oxygen to yield a(n) a. acid b. hydroxide c. oxide d. metal 5. A metal carbonate, when heated, decomposes into a metal oxide and a. carbon b. carbon dioxide c. oxygen d. hydrogen 6. In the equation 2 Al (s) + 3 Fe(NO 3 ) 2(aq) 3 Fe (s) + 2 Al(NO 3 ) 3(aq), iron has been replaced by a. nitrate b. water c. aluminum d. nitrogen 7. The replacement of bromine by chlorine in a salt is an example of a single displacement reaction by a. halogens b. sodium c. water d. electrolysis 8. The reaction of calcium oxide with water will yield a. calcium and oxygen gas b. calcium hydroxide c. calcium and salt d. carbon dioxide and water

5 9. Predict the product of the following reaction: MgO + CO 2 a. MgCO 3 b. Mg + CO 3 c. MgC + O 3 d. MgCO 2 + O 10. What product(s) will result from the decomposition of HgO? a. mercury (I) oxide b. mercury and oxygen c. mercury hydroxide d. only mercury 11. A reaction in which two or more substance combine to form a new substance is called a(n) reaction. 12. The equation AB A + B is the general equation for a reaction. 13. A reaction in which one element replaces a similar element in a compound is called a(n) reaction. 14. is the decomposition of a substance by an electric current. 15. Group 1 metals react with water to produce and metal hydroxides.

6 Activity Series of the Elements 1. The ability of an element to react is referred to as an element s a. valence b. activity c. stability d. electronegativity 2. An element in the activity series can replace any element a. in the periodic table b. below it on the list c. above it on the list d. in its group 3. An activity series is useful because it allows a person to predict a. whether or not a certain chemical reaction will occur b. the amount of energy released by a chemical reaction c. the electronegativity values of elements d. the melting points of elements 4. For a single replacement reaction, an element will replace from a compound in aqueous solution those elements a. above it in the activity series b. with lower atomic masses c. below it in the activity series d. with higher atomic masses

7 Write and balance and classify the following equations. use symbols where appropriate 1. decomposition of aqueous nitrous acid 2. strontium metal is combined with oxygen gas 3. decomposition of solid sodium chlorate 4. solid magnesium oxide is combined with water 5. solutions of ferric acetate is combined with mercuric iodide 6. solid bromine is combined with ammonium fluoride solution 7. decomposition of solid calcium carbonate 8. combustion of gaseous C 2 H 6 9. solid dinitrogen pentoxide is combined with water 10. combustion of C 6 H 13 OH 11. decomposition of solid aluminum oxide 12. solid lithium chloride is combined with oxygen gas 13. solutions of ammonium hydroxide is combined with nickelic chloride 14. decomposition of solid potassium hydroxide 15. zinc metal is combined with a solution of cobaltous fluoride 16. chlorine gas is combined with plumbous bromide solution 17. combustion of liquid C 3 H a piece silver is combined with a solution of cupric nitrate 19. decomposition of carbonic acid solution

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