Stoichiometery Practice
Name: ______________________________
period: _____
If needed Balance each of the following reactions and calculate as required so you can predict the theoretical
yield. (also practice naming the compounds and the type of reaction, you don’t need to write down names)
1)
____ Cu + ____ O2  ____ CuO
How many moles of oxygen must react with 25 grams of copper?
____ H2O2  ___ H2O + ___ O2
How many liter of water vapor at STP will be produced when 50 grams of oxygen
are produced?
2)
3)
____ AgCl  ___ Ag + ___ Cl2
How many grams of silver can be recovered from 200 grams of silver (I) chloride?
4)
____ Na + ___H2O  ___ NaOH + ___ H2
How many grams of sodium are required to produce 3 moles of sodium hydroxide?
5)
____ ZnO  ___ Zn + ___ O2
100 grams of zinc(II) oxide decompose?
How many liters of Oxygen are released when
____ Fe + ___ H(C2H3O2)  ___ Fe(C2H3O2)2 + ___ H2
How many liters of hydrogen gas at STP will be produced when 25 grams of iron
react with acetic acid?
6)
Limiting reagents problems
7)
__2__ Na + __1_H2 SO4  __1_ Na2SO4 + _1__ H2
Would 25 grams of sodium react completely with 100 grams of sulfuric acid? Show
your work.
8)
____ Al + ___O2  ___Al2O3
If 50 grams of aluminum reacted with 50 grams of oxygen, how many grams of
Aluminum (III) oxide form?
9)
__1__ NaOH + __1_HCl  _1__ NaCl + _1__ H2O
How many grams of NaCl will be formed from 25 grams of NaOH and 25 grams of HCl?
10)
____ NaI + ___H3PO4  ___ Na3PO4 + ___ HI
If you have 50 grams of each reagent (reactant) which is the limiting reagent?
More practice for the test
11)
____ Cl2 + ___NaBr  ___ Br2 + ___ NaCl
How much bromine gas can be produced from 15 liters of chlorine gas and 50 grams of
sodium bromide?
12)
____Al2(SO4)3
+ ___Ca(OH)2  ___ Al(OH)2 + ___ CaSO4
How much aluminum hydroxide can be obtained from 75 g Al2(SO4)3 and 50 grams of
Ca(OH)2 ?
ANSWERS: to worksheet problems
__2__ Cu + __1__ O2  __2__ CuO
How many moles of oxygen must react with 25 grams of copper? .197 mole O2
2)
__2__ H2O2  _2__ H2O + _1__ O2
How many liter of water vapor at STP will be produced when 50 grams of oxygen
are produced?
70 liters H2O
3)
_2__ AgCl  _2__ Ag + _1__ Cl2
How many grams of silver can be recovered from 200 grams of silver (I) chloride?
150.5 g Ag
4)
__2__ Na + __2_H2O  __2_ NaOH + _1__ H2
How many grams of sodium are required to produce 3 moles of sodium hydroxide?
69 g Na
5)
__2__ ZnO  _2__ Zn + __1_ O2
How many liters of Oxygen are released
when 100 grams of zinc(II) oxide decompose?
13.8 liter O2
1)
__1__ Fe + __2_ H(C2H3O2)  __1_ Fe(C2H3O2)2 + __1_ H2
How many liters of hydrogen gas at STP will be produced when 25 grams of iron
react with acetic acid?
10. liter H2
6)
Other side of worksheet
Limiting reagents problems
7)
__2__ Na + _1__H2 SO4  _1__ Na2SO4 + __1_ H2
Would 25 grams of sodium react completely with 100 grams of sulfuric acid? Show
your work.YES!
You would only need 46.7 g of H2SO4 to use up 25 g of Na
8)
__4__ Al + _3__O2  _2__Al2O3
If 50 grams of aluminum reacted with 50 grams of oxygen, how many grams of
Aluminum (III) oxide form?
94.4 g Al2O3; Al is the limiting reagent
9)
__1__ NaOH + _1__HCl  _1__ NaCl + _1__ H2O
How nmany grams of NaCl will be formed from 25 grams of NaOH and 25 grams of HCl?
36.6 g NaCl is produced; NaOH is the limiting reagent
10)
__3__ NaI + _1__H3PO4  __1_ Na3PO4 + _3__ HI
If you have 50 grams of each reagent (reactant) which is the limiting reagent?
NaI is the limiting reagent; 50 g NaI only needs 10.89 g H3PO4
JUST ANSWERS: to worksheet problems
1)
2)
3)
4)
5)
6)
.197 mole O2
70 liters H2O
150.5 g Ag
69 g Na
13.8 liter O2
9.6 liter H2
Other side of worksheet
Limiting reagents problems
7)
YES!
You would only need 46.7 g of H2SO4 to use up 25 g of Na
8)
94.4 g Al2O3; Al is the limiting reagent
9)
36.6 g NaCl is produced; NaOH is the limiting reagent
10)
NaI is the limiting reagent; 50 g NaI only needs 10.89 g H3PO4