KC- Limiting Reactant & 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

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%

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

• 1.16%
• 116%
• 85%
• 76%

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%

Consider the following image. Match the following images to their names.

• Limiting Reagent

• 
• Excess Reagent

• 
• Product

• 

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

A limiting reactant is a reactant that.....

• runs out during a chemical reaction

• causes a reaction to stop

• determines the amount of products that can be made

• all of these

The limiting reactant

• slows the reaction down
• is used up first
• is the reactant that is left over
• controls the speed of the reaction

Which of the following is necessary to switch from one substance to another in a stoichiometry problem?

• Molar Mass

• Molar Ratio

• Periodic Table

• Specific Heat

Balance the following equation with the correct coefficients:

___ SnO₂ + ___ H₂ → ___ Sn + ___ H₂O

• 1, 2, 1, 2

• 2, 1, 1, 2

• 1, 1, 1, 1

• 2, 2, 3, 2