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Percent Yield

Total questions: 7

Worksheet time: 49mins

Name
Class
Date
1.

If 5.2 grams of Mn(SO4)2 are actually formed in the lab, what is the percent yield?

The calculated number of grams for Mn(SO4)2 is 6.30 grams

a)

37%

b)

48%

c)

53%

d)

83%

2.

Reactant and products might adhere to containers causing actual yield to be less than theoretical yield.

a)

true

b)

false

3.

Competing reactions might occur forming other products causing your actual yield to be less than your theoretical yield.

a)

true

b)

false

4.

Some product can be transformed completely into energy causing your actual yield to be less than your theoretical yield.

a)

true

b)

false

5.

Some product may be lost during filtering causing your actual yield to be less than your theoretical yield.

a)

true

b)

false

6.

If 10.5g of Na3N is decomposed, calculate the theoretical mass of sodium that should be produced. If only 2.84g of sodium is actually collected, what is the percent yield?


2Na3N → 6Na + N2

a)

77%

b)

65%

c)

33%

d)

54%

7.

In the balanced reaction below, 9.8 g of benzene, C6H6, reacts with excess HNO3 resulting in 1.0 g of H2O. What is the percentage yield?

Molar mass (g/mol): C6H6 = 78 HNO3= 63 C6H5NO2= 123 H2O = 18

C6H6 + HNO3 → C6H5NO2 + H2O

a)

22%

b)

44%

c)

12%

d)

85%