Review Questions - Chemical Reactions
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Chapter 11
The starting substances in a chemical reaction
An equation that does not indicate the relative amounts of reactants and products
A → in the reaction means_____________.
The symbol (aq) stands for ____________.
A substance that speeds up the reaction but is not used up in the reaction.
The small whole numbers that are used in front of formulas to balance the
equation.
7. Answer the following questions using this equation: AgNO3 + H2S → Ag2S + HNO3
a. What type of reaction is this equation?
b. Balance the equation.
8. Balance the following equation: FeCl3 + NaOH → Fe(OH)3 + NaCl
9. Which product in 8 is the most likely precipitate?
10. A chemical change in which two or more substances form a single new substance.
11. A chemical change in which one element replaces a second element in a compound.
12. A table that lists metals in order of decreasing reactivity.
13. In order for a metal to replace another in a reaction, the metal must be ________ on the
chart.
14. CaCO3 →
a. What is the type of reaction?
b. Write the products for the reaction.
15. What are the three possible products in a double replacement reaction?
16. The products of a combustion reaction are always ____________________.
17. An ion that appears on both sides of an equation and is not directly involved in the reaction
is called a ___________________.
18. An equation for a reaction in solution that shows only those particles that are directly
involved in the chemical change.
19. Al + N2 →
a. What is the type of reaction?
b. Write the product(s)
c. Balance the equation
20. A reaction that releases energy is called ____________________.
21. A reaction that takes in energy is an _____________________reaction.
22. Energy is a ________(reactant or product) when energy is released?
23. Cl2 + NaI →
a. What type of reaction?
b. Write the product(s)
c. Balance the equation
24. Finish the reaction: K + _________ → KOH + H2
25. Finish the reaction: C2H5OH + ____________ → CO2 + H2O
ANSWERS:
1. reactant
2. skeleton
3. yields
4. aqueous – dissolved in water
5. catalyst
6. coefficient
7. a. double replacement
b. 2 AgNO3 + H2S → Ag2S + 2 HNO3
8. FeCl3 +3 NaOH → Fe(OH)3 +3 NaCl
9. Fe(OH)3
10. synthesis (combination)
11. single replacement
12. activity series
13. higher
14. a. decomposition
b. CaO + CO2
15. water, gas, ppt.
16. carbon dioxide and water
17. spectator ion
18. net ionic equation
19. a. synthesis
b. AlN
c. 2 Al + N2 → 2 AlN
20. exothermic
21. endothermic
22. product
23. a. single replacement
b. I2 + NaCl
c. Cl2 + 2 NaI → I2 + 2 NaCl
24. H2O
25. O2