Percent Yield in Chemistry

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

• 16%

• 116%

• 85%

• 76%

Tags

NGSS.HS-PS1-7

The reaction of 25.0 g benzene, C₆H₆, with excess HNO₃ resulted in 21.4 g C₆H₅NO₂. What is the percentage yield?

C₆H₆ + HNO₃ → C₆H₅NO₂ + H₂O

• 100%

• 27.39%

• 54.29%

• 85.62%

Tags

NGSS.HS-PS1-7

P₄ + 6Cl₂ --> 4PCl₃ 
The reaction of 75.0g P₄ with excess chlorine gas produces 110g PCl₃ in lab. Find the theoretical yield and calculate percent yield for the reaction. 

• 78%

• 64%

• 27%

• 33%

Tags

NGSS.HS-PS1-7

LiOH + KCl → LiCl + KOH
b) I actually produced 6 grams of lithium chloride and I began this reaction with 20.0 grams of lithium hydroxide. What is my percent yield?

• 16.9%

• 5.91%

• 1.88%

• 12.3%

Tags

NGSS.HS-PS1-7

Lead nitrate can be decomposed by heating.  What is the % yield of the decomposition reaction if 7.4g Pb(NO₃)₂ are heated to give 4.1 g PbO?
2Pb(NO₃)_{2 (s)}→2PbO_(s)+4NO_2(g)+O_2(g)

• 82%

• 44%

• 56%

• 67%

Tags

NGSS.HS-PS1-7

percent yield

• The substance is completely gone after the reaction has finished

• the percentage ratio to the original yield

• a relationship taking place in a reaction to form a compound

• the amount of product gathered from the original reaction

Which of the following best describes the concept of percent yield in a chemical reaction?

• The ratio of actual yield to theoretical yield, multiplied by 100

• The ratio of reactants to products, multiplied by 100

• The ratio of mass of products to mass of reactants, multiplied by 100

• The ratio of moles of products to moles of reactants, multiplied by 100

A reaction has a theoretical yield of 50g and an actual yield of 45g. What is the percent yield?

• 90%

• 95%

• 85%

• 80%

Tags

NGSS.HS-PS1-7

In a laboratory experiment, 10g of product was expected, but only 8g was obtained. Calculate the percent yield.

• 80%

• 75%

• 85%

• 90%

The reaction of 100g of reactant produces 70g of product. If the theoretical yield is 80g, what is the percent yield?

• 87.5%

• 90%

• 92.5%

• 95%

Tags

NGSS.HS-PS1-7