Percent Yield

Actual Yield

• The amount of product you make after a chemical reaction has occurred.

• The amount of product you expect to make after a reaction. This is a calculated value.

Theoretical Yield

• The amount of product you make after a chemical reaction has occurred.

• The amount of product you expect to make after a reaction. This is a calculated value.

CH₄  +  2O₂  →  CO₂  +  2H₂O
24 grams of CH₄ was added to the above reaction. Calculate the theoretical yield of CO₂.

• 66 grams
• 132 grams
• 33 grams
• 8.72

Tags

NGSS.HS-PS1-7

When reacting Na with Cl₂, we calculated that the theoretical yield should be 12.5 grams. Our actual yield was 13.0 grams. What is the percent yield?

• 100%
• 104%
• 96%
• 1.04

Tags

NGSS.HS-PS1-7

2Fe₂O₃  +  C  →  Fe  +  3CO₂
You add 28 grams of carbon. You find the actual yield to be 181.2 grams of CO₂. What is the percent yield of CO₂? (Hint: calculate theoretical yield of CO₂ first)

• 15.8%
• 209.2%
• 6435%
• 15.5

Tags

NGSS.HS-PS1-7

Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.

• 1.16%
• 116%
• 85%
• 76%

Tags

NGSS.HS-PS1-7

Zn + CuCl​₂​​ → ZnCl​₂​ ​+ Cu

Theoretically, how many moles of ZnCl₂ will be produced from 23.0 g of Zn

• 0.354 moles

• 1495 moles

• 47.76 g

Zn + CuCl​₂​​ → ZnCl​₂​ ​+ Cu

Theoretically, How many grams of ZnCl₂ will be produced from 23.0 g of Zn

• 0.354 moles

• 1495 moles

• 47.76 g

Zn + 2HCl → ZnCl​₂ ​​+ H​₂​​
15 grams of HCl should theoretically produce 0.42 grams of H₂. The reaction actually produced 0.15 grams of H₂. What is the percent yield of H₂?

• 2.8%
• 280%
• 1%
• 36%

Tags

NGSS.HS-PS1-7

In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield?

• 82%
• 0.82%
• 10.1 %
• 100%

Tags

NGSS.HS-PS1-7