Percent Yield Worksheet - Strongsville City Schools



Name : ___________________________________________________________ Period 1 2 3 4 5 6 7 8

Stoichiometry - Percent Yield Worksheet#1 SHOW ALL WORK!!!!!

NOTE: % Yield = Actual Yield x 100

Theoretical Yield

1) Write, predict products and balance the equation for the reaction of iron (III) phosphate with sodium sulfate

to make iron (III) sulfate and sodium phosphate.

a) If I perform this reaction with 25 grams of iron (III) phosphate and an excess of sodium sulfate, how many

grams of iron (III) sulfate can I make?

b) If 18.5 grams of iron (III) sulfate are actually made when I do this reaction, what is my percent yield?

c) Is the answer from problem #3 reasonable? Explain.

d)If I do this reaction with 15 grams of sodium sulfate and get a 65.0% yield, how many grams of sodium

phosphate will I make?

2) Lithium hydroxide reacts with potassium chloride.

a) Write, predict products and balance the reaction

b) I began this reaction with 2.0x101 grams of lithium hydroxide. What is my theoretical yield of lithium chloride?

c) I actually produced 6.0 grams of lithium chloride. What is my percent yield?

3) propane (C3H8) burns in the presence of oxygen

a) write, predict and balance the reaction

b) If I start with 5.00 grams of C3H8, what is my theoretical yield of water?

c) I got a percent yield of 75% How many grams of water did I make?

4) Beryllium reacts with hydrochloric acid

a) write the equation, predict the products and balance

a) My theoretical yield of beryllium chloride was 10.7 grams. If my actual yield was 4.5 grams, what was my

percent yield?

Name : ___________________________________________________________ Period 1 2 3 4 5 6 7 8

Stoichiometry - Percent Yield Worksheet#1 SHOW ALL WORK!!!!!

NOTE: % Yield = Actual Yield x 100

Theoretical Yield

1) Write, predict products and balance the equation for the reaction of iron (III) phosphate with sodium sulfate

to make iron (III) sulfate and sodium phosphate.

a) If I perform this reaction with 25 grams of iron (III) phosphate and an excess of sodium sulfate, how many

grams of iron (III) sulfate can I make?

b) If 18.5 grams of iron (III) sulfate are actually made when I do this reaction, what is my percent yield?

c) Is the answer from problem #3 reasonable? Explain.

d)If I do this reaction with 15 grams of sodium sulfate and get a 65.0% yield, how many grams of sodium

phosphate will I make?

2) Lithium hydroxide reacts with potassium chloride.

a) Write, predict products and balance the reaction

b) I began this reaction with 2.0x101 grams of lithium hydroxide. What is my theoretical yield of lithium chloride?

c) I actually produced 6.0 grams of lithium chloride. What is my percent yield?

3) propane (C3H8) burns in the presence of oxygen

a) write, predict and balance the reaction

b) If I start with 5.00 grams of C3H8, what is my theoretical yield of water?

c) I got a percent yield of 75% How many grams of water did I make?

4) Beryllium reacts with hydrochloric acid

a) write the equation, predict the products and balance

a) My theoretical yield of beryllium chloride was 10.7 grams. If my actual yield was 4.5 grams, what was my

percent yield?

Stoichiometry - Percent Yield Worksheet - Key

1) Write the equation for the reaction of iron (III) phosphate with sodium sulfate to make iron (III) sulfate and sodium phosphate. 2 FePO4 + 3 Na2SO4 ( 1 Fe2(SO4)3 + 2 Na3PO4

a) If I perform this reaction with 25 grams of iron (III) phosphate and an excess of sodium sulfate, how many grams of iron (III) sulfate can I make?

25/ = 1/3 = x = 17.2 grams iron (III) sulfate

b) If 18.5 grams of iron (III) sulfate are actually made when I do this reaction, what is my percent yield?

(18.5 / 17.2) x 100% = 108% yield

c) Is the answer from problem #3 reasonable? Explain.

No. Any yield over 100% is a violation of the Law of conservation of mass.

d) If I do this reaction with 15 grams of sodium sulfate and get a 65.0% yield, how many grams of sodium phosphate will I make?

According to the stoichiometry, the theoretical yield is 11.5 grams. Multiplying this by 0.650, you get 7.48 grams.

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Theoretical Yield = answer to your stoich problem.

Actual Yield = given in the problem or the

experimental yield.

Theoretical Yield = answer to your stoich problem.

Actual Yield = given in the problem or the

experimental yield.

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