Chemistry: Supplemental Stoichiometry Problems
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1
2
3
4Name: ________________________
Hour:
____
Date:
___________
Chemistry: Supplemental Stoichiometry Problems
Directions: Solve each of the following problems. Assume excess of any reactant that isn’t mentioned, unless otherwise
specified. Show your work, including proper units, to earn full credit.
1. Given the balanced equation, show what the following molar ratios
8 CO
(i.e., the conversion factors) should be. Include units in all terms.
2 C
H
+ 13 O
+ 10 H
O
4
10
2
2
2
a. C
H
/ O
b. O
/ CO
c. O
/ H
O
d. C
H
/ CO
e. C
H
/ H
O
4
10
2
2
2
2
2
4
10
2
4
10
2
2 KCl + 3 O
2. How many moles of oxygen are made if 12.0 moles of potassium chlorate react?
2 KClO
3
2
Q3 involves the reaction: Copper(II) chloride reacts w/sodium nitrate to produce copper(II) nitrate and sodium chloride.
3A. Write the balanced equation
for the reaction.
3B. If 20.0 g of copper(II) chloride react with 20.0 g of sodium nitrate, what mass of sodium chloride is formed?
3C.
What is the limiting reactant? __________________
3D.
How many moles of copper(II) nitrate are formed?
3E.
What mass of excess reactant is left over?
ANSWERS:
2. 18.0 mol O
3B. 13.8 g NaCl
3C. NaNO
3D. 0.118 mol Cu(NO
)
3E. 4.2 g CuCl
2
3
3
2
2
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