% Yield and LR

Theoretically you should have 38g of product but you only got 34g, what is your percent yield?

• 11%

• 1.12%

• 0.89%

• 112%

• 89%

Select the true statements about limiting reactants.

• is left over after the reaction is complete

• it is completely used up

• controls the amount of product formed

• the reaction stops when it is used up.

actual yield is:

• always less than 100

• the calculated amount using stoichiometry

• the calculated amount using the data table

• the amount of product recovered in the experiment

When reacting Na with Cl₂, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

• 90.4%

• 104%

• 96.15%

• 1.04%

The reactant that is completely used up in a reaction is called the ...........................................

• limiting reagent.

• excess reagent.

The reactant that is not completely used up in a reaction is called the ...........................................

• limiting reagent.

• excess reagent.

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

• 1.16%
• 116%
• 85%
• 76%

A reaction was predicted to produce 32.4 grams of a compound. When the product was measured, there were only 26.1 grams made. What is the percent yield?

• 80.6%
• 6.3%
• 24.1%
• 58.5%

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

• theoretical yield
• mole ratio
• actual yield
• percentage yield

9. Complete the equation for the percent yield of a chemical reaction:
Percent yield=(________)÷(________)×100%

• actual yield; theoretical yield
• theoretical yield; actual yield