Chemistry 3.2.4

Question 1

When does a Chemical Reaction Stop?

Answer 1

When one of the Reagents is Used up.

Question 2

What is the ‘Limiting Reactant’ of a Chemical Reaction?

Answer 2

The Limiting Reactant of a Chemical Reaction is the Reagent that gets Used up First, Causing the Reaction to Stop all together.

Question 3

What is the ‘Excess’ in a Chemical Reaction?

Answer 3

The Reagent that isn’t Used up once the Chemical Reaction Stops. Not the Limiting Reactant. It is in Excess.

Question 4

The Limiting Reagent is the Reactant which is not ___ in ___ in a Reaction.

Answer 4

Present, Excess.

Question 5

The Amount of Product Obtainable is ___ Proportional to the Amount of the Limiting Reagent Added at the Beginning of the Reaction.

Answer 5

Directly.

Question 6

In Order to Determine which Reactant is the Limiting Reagent in a Reaction, we have to Consider the Amounts of each Reactant Used, & the ___ ___ of the Balanced Chemical Equation.

Answer 6

Molar Ratio.

Question 6

If you Use Half of the Limiting Reagent, you will get Half of the ___, Provided that the other Reagents are Present in Excess.

Answer 6

Product.

Question 7

The Limiting Reagent Indicates/Controls the Maximum Possible Amount of ___ that can Form.

Answer 7

Product.

Question 8

What are the Steps to Determining the Limiting Reactant? (3)

Answer 8

-Convert the Mass of Each Reactant into Moles by Dividing by the Ar/Mr.

-Write the Balanced Equation, & Determine the Molar Ratio.

-Look at the Equation, & Compare the Moles.