Unit 3: Lesson 3

Question 1

Limiting Reactant

Answer 1

The reactant that runs out first in a reaction. After it is all used up, no more product can be formed and the reaction is over. It is not necessarily the smallest amount of moles, the smallest ratio between the moles and the coefficient.

Question 2

Excess Reactant

Answer 2

What is left over after the reaction is complete because the limiting Reactant got all used up.

Question 3

Theoretical Yield

Answer 3

The maximum amount of product that can be formed in a reaction.

Question 4

How to find Theoretical Yield

Answer 4

separate calculations for each compound Reactant in the problem. Take the amount of moles given and use a mole ratio to convert it to the product specified. Repeat with the other compounds. The smallest value is the theoretical Yield because that Molar value is the limiting Reactant (Smallest=gets used up)

Question 5

How to find Limiting Reactant

Answer 5

The equation that resulted in the theoretical Yield involves the limiting Reactant. Find theoretical Yield, trace it back to which compound it came from

Question 6

Actual Yield

Answer 6

How much of the product was actually produced in the chemical reaction

Question 7

Percent Yield

Answer 7

(Actual Yield/Theoretical Yield) x 100%
How accurate the theoretical Yield was compared to the actual Yield

Question 8

Percent Error

Answer 8

100-%Yield
How inaccurate the theoretical Yield was compared to the actual Yield