H CH 10 HOMEWORK
1. If 120 moles of sodium carbonate are mixed with calcium hydroxide, how many
moles of sodium hydroxide are formed?
240 moles NaOH
2. When 80g of calcium chloride are mixed with silver nitrate, how many moles of silver
chloride are produced?
1.45 moles AgCl
3. If 90 moles of barium chloride are mixed with sulfuric acid, how many grams of
barium sulfate are produced? 20970 g BaSO4
4. If 500g of potassium iodide are mixed with lead (II) acetate, what mass of lead (II)
iodide is formed?
694.2 g PbI2
5. How many grams of oxygen are prepared from heating 400g of potassium chlorate?
157.37 g O2
6. How many grams of calcium carbonate are required in the preparation of 50g of
calcium oxide?
89.28 g CaCO3
7. When 50 moles of magnesium are mixed with silver nitrate solution, how many grams
of silver are precipitated?(SF)
10000 g Ag
8. Calculate the number of moles of carbon needed to produce 80g of carbon dioxide by
burning.
1.82 mol C
9. Calculate the mass of sulfur that will react with 40 grams of copper.
20.2 g S
10. Calculate the moles of silver produced by heating 10g of silver oxide.
.086 moles Ag
11. How many moles of cane sugar are decomposed to give 700cm3 of carbon according
to the following reaction:
C12H22O11  C + H2O
10.99 moles sugar
12. How many grams of water are needed in the reaction of 45 moles of lithium with
water?
810 g HOH
13. If 3500 lbs of carborundum, SiC, are produced in an electric furnace, what mass of
carbon was used?
SiO2 + C  SiC + CO
1430100 g C
14. 50 grams of sulfuric acid is added to lead(II)chloride. The resulting solid is filtered
and removed. Iron is then added to the solution. How many grams of hydrogen would
be produced after the reaction. Use Fe+2
1.02 g H2
15. How many pounds of sodium are in 54 moles of sodium sulfate?
5.47 lbs Na
16. A butane lighter contains 60g of butane (C4H10). If the butane is burned and carbon
dioxide has a density of .3 g/L, what volume of carbon dioxide would be produced?
606.9 L CO2
17. 25g of potassium iodide are mixed with excess lead (II) nitrate. Assuming all of the
potassium iodide reacts, how many grams of potassium reacted?
5.87 g K
18. How many grams of chlorine gas must be reacted with excess sodium iodide if 10g
of sodium chloride are produced?
6.03 g Cl2
19. If 50g of sodium chloride was produced from a decomposition reaction, what was
my reactant and how many grams of it did I have?
91.38 g NaClO3
20. A cube of zinc having a length of 3.50 cm is dropped into a beaker of hydrochloric
acid. How many moles of acid will react?
9.41 moles HCl
Limiting Reactants:
1. If 2 moles of lead (II) carbonate are mixed with 3 moles of hydrochloric acid, what is
the limiting reactant?
HCl
2. If 117.5 g of cadmium are mixed with 35g of hydrofluoric acid, what is the limiting
reactant?
HF
3. If 4.50g of zinc are mixed with 8g copper (II) chloride, how many grams of copper are
produced?
3.91 g Cu
4. If 54g of iron are mixed with 88g of copper (I) nitrate, how many moles of copper are
produced? Fe+3
.7 moles Cu
5. 3000g of propane(C3H8) are allowed to react with 500g of oxygen. How many grams
of propane would be left over?
2862.5 g C3H8
6. 4 moles of calcium chloride are mixed with 125g of nitric acid, how many grams of
hydrochloric acid are produced?
0 NR
Percent Yield:
1. A sample of lime (CaO) has a mass of 69g and was prepared by heating 131g of
limestone (CaCO3). What was the percent yield of the reaction?
94%
2. Freon-12 (CCl2F2) is prepared from CCl4 by reaction with HF. HCl is the other
product of the reaction. What is the percent yield of a reaction in which 12.5g of CCl2F2
is produced from 32.9g of CCl4?
48.13%
3. The reaction of 3 moles of hydrogen with 2 moles of iodine produces 1 mole of
hydroiodic acid. Determine the limiting reactant and percent yield.
I2 limiting; 25%
4. What is the percent yield of NaClO2 if 106g is isolated from the reaction of 202.3g of
ClO2 with a solution containing 3.229 moles of NaOH?
2ClO2 + 2NaOH  NaClO2 + NaClO3 + H2O
78%
5. If a mixture of 6 moles of hydrogen and 15g of oxygen react to form 11g of water,
what is the percent yield? 65.16%
Practice Quiz:
1. 14 g of calcium bromide are mixed with chlorine. How many mL of liquid
bromine are produced?
3.59 mL
2. Silver nitrate is mixed with 25g of sodium chloride to produce 17g of silver
chloride. What is the percent yield for the reaction?
27.58%
3. 42g of zinc is added to 68g of tin (II) sulfate to produce 31g of solid tin. What is
the percent yield?
82.37%
4. 14 moles of potassium carbonate would produce how many grams of carbon
dioxide?
616 g CO2
5. If 114g of iodine are added to sodium chloride, how many moles of chlorine are
produced?
0 mol; NR
6. If 20g of HCl react with 40g of NaOH and the %yield for the reaction is 96%,
how much salt was actually produced?
30.93 g NaCl
7. Look at the following reaction: Fe + AuCl3  FeClx + Au
How could you tell for sure whether you produced FeCl2 or FeCl3?
The ratio of Fe to Au would be different.
Multiple Choice:
D B A D B D
A1. CH4 + 2 O2  CO2 + 2 H2O
2. C1 and C3
B1. Satisfy the law of conservation of mass
2. 3 million
C. 4 x ○●○ and 6 x ◦○◦
D. .2 moles HCl. It is limiting and all of it will be used.