Section 12.4
Percent Yield
Practice Test
1.
What is the percent yield of CO
2
if a reaction using 10.0 g CO with excess O
2
produces 12.8 g CO
2
?
2CO+O
2
→ 2CO
2
SC.B.1.4.2
a.
84.40%
b.
78.10%
c.
81.50%
d.
76.40%
Hint
2.
The reaction of 5.0 grams of fluorine with excess chlorine produced 5.6 grams of ClF
3
. What percent yield of ClF
3
was obtained?
Cl
2
+ 3F
2
→2ClF
3
SC.B.1.4.2
a.
86%
b.
76%
c.
58%
d.
69%
Hint
3.
What is the percent yield for the reaction between 9.8 grams of Ca
OH
2
and 9.8 grams of H
3
PO
4
when 2.5 grams of
Ca
3
PO
4
2
are actually obtained?
3Ca
OH
2
+2H
3
PO
4
→Ca
3
PO
4
2
+6H
2O
SC.B.1.4.2
a.
27%
b.
36%
c.
19%
d.
9%
Hint
4.
What is the maximum amount of product that can be produced from a given amount of reactant?
a.
percent yield
b.
mole ratio
c.
actual yield
d.
theoretical yield
Hint
