4th Percent Yield

The ______________ yield is the maximum amount of product possible in a reaction. This determines the amount of product that should be produced in a perfect setting

• Percent
• actual
• stoichiometry
• theoretical

What is the equation to calculate percent yield?

• (Actual yield / Theoretical yield) x 100% = Percent yield

• (Theoretical yield / Actual yield) x 100% = Percent yield

• Mass (1 Mole / Molar mass) x 100% = Percent yield

• Mass x Speed x 100% = Percent yield

What does percent yield indicate?

• The mass of product that should be obtained

• How quickly the reaction is completed

• The product of product actually obtained

• The efficiency of the chemical reaction

What is an excess reactant?

• Substance you end with

• Substance that determines the rate of reaction

• Substance that is not used up completely

• Substance that is used up completely

2. True or False?
A chemical reaction stops before the limiting reagent is used up.

• True
• False

1. What is a limiting reagent?

• any reactant used up first in a reaction.
• any reactant left over at the end of a reaction.
• the maximum amount of product formed from a given amount of reactant.
• the purity of the reactant.

7. The amount of product that actually forms when a chemical reaction is carried out in a laboratory is called the _________ yield.

• actual
• theoretical
• percent

What is the formula for percent yield?

This is what you call a reactant that you have enough of. The one that DOES NOT run out.

• Limiting Reactant

• Excess Reactant

• Highly Reactant

• Super Reactant

In a lab, a scientist calculated that 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?

• 82.1%

• 0.82%

• 10.1%

• 122%