Name____________
Per._____________
1.
Balance the following equations…
a. 2K + 2H2O  2KOH + H2
b. 2Ca + O2  2CaO
c. Na2O + H2O  2NaOH
d. 2KClO3  2KCl + 3O2
2. Identify the following reactions as combination (C), decomposition (D), single displacement (SD), or
double displacement (DD).
a. 2Al(OH)3 + 3H2SO4  Al2(SO 4)3 + 6H2O
__Double replacment__
b. 4K + O2  2K2O
___Combination_
c. Cl2 + 2NaBr  Br2 + 2NaCl
___Single Replacement_
d. 2HgO  2Hg + O2
____Decomposition_
e. MgCl2 + 2AgNO3  2AgCl + Mg(NO3)2
__Double Replacement__
3. I know your WS has a #3. See the WS on Types of Reactions. It is the bottom portion.
4. Balance the following equation and calculate how many g of Cu can be formed from 5 moles of Al and 8
g of CuSO4. What is the limiting reactant?
2Al + 2CuSO4  2Cu + Al2(SO 4)3
2molCu 63.5gCu
"
= 317.4gCu
2molAl 1molCu
1molCuSO4 2molCu 63.5gCu
8gCuSO4 "
"
= 3.18gCu
159.5g 2molAl 1molCu
5molAl "
3 g Cu can be made. CuSO4 is the limiting reactant
5. What volume of SO2 gas will be produced (at STP) when 1111 grams of ZnS is combined with 1231 liters
of O2 gas. (Be sure to balance the equation)
2ZnS + 3O2  2ZnO + 2SO2
!
1molZnS 2molSO2 22.4LSO2
"
"
= 255.5LSO2
97.4gZnS 2molZnS 1molSO2
1molO2 2molSO2 22.4LSO2
1231LO2 "
"
= 820.7LSO2
22.4L 3molO2 1molSO2
1111gZnS "
255.5 L SO2 will be produced
!
6. What is the percent yield when 123 g Ag2O reacts with an excess amount of carbon to produce 110 g
Ag ? (Be sure to balance the equation)
2Ag2O + C  CO2 + 4Ag
123gAg2O "
!
!
%yield =
1molAg2O 4molAg 107.9gAg
"
"
= 115gAg
231.8g 2molAg2O 1molAg
110g
"100 = 96%
115g