Worksheet: Percent Yield Name______________
CHEMISTRY: A Study of Matter
© 2004, GPB
8.22
1. Chlorobenzene, C
6
H
5
Cl, is used in the production of chemicals such as aspirin
and dyes. One way that chlorobenzene is prepared is by reacting benzene, C
6
H
6
,
with chlorine gas according to the following BALANCED equation.
C
6
H
6
(l) + Cl
2
(g) C
6
H
5
Cl (s) + HCl (g)
a. What is the theoretical yield if 45.6 g of benzene react?
b. If the actual yield is 63.7 g of chlorobenzene, calculate the percent yield.
2. When carbon disulfide burns in the presence of oxygen, sulfur dioxide and
carbon dioxide are produced according to the following equation.
CS
2
(l) + 3 O
2
(g) CO
2
(g) + 2 SO
2
(g)
a. What is the percent yield of sulfur dioxide if the burning of 25.0 g of
carbon disulfide produces 40.5 g of sulfur dioxide?
b. What is the percent yield of carbon dioxide if 2.5 mol of oxygen react and
32.4 g of carbon dioxide are produced?
