Lesson 6.8: Mole to Mole Conversions

Lesson 6.8: Mole to Mole Conversions

What is a Ratio?

Multiple Choice

What is the mole ratio of this reaction?

4Fe + 3O₂ → 2Fe₂O₃

• 4:3:2

• 2:3:4

• 3:2:4

• 3:4:2

Multiple Choice

What is the mole ratio of this reaction?

2Ag₂O → 4Ag + O₂

• 2:4:1

• 1:2:4

• 1:4:2

• 4:2:1

A Mole Ratio can be used as a conversion factor

• Compounds or elements of a reaction can be compared by using the mole ratio as a conversion factor.

Step 1

• Grams are given in the problem

• To compare the two parts of the reaction we must know the number of moles

• Convert the grams to moles

Step 2

• The answer from part 1 is the starting number for our second conversion

• Use the coefficients (Mole ratio) as the conversion factor.

• In this example the number of moles is the same so the answer is the same as the first conversion.