What do we need to know to solve the mole to mole problem:

•  We need to know how to balance the chemical equations.

•  Extract the Mole ratio from the equation. •  Dimensional analysis.

Example -1:

Suppose we have 3.00 mol of N2 reacting with sufficient H2, how many moles of NH3 will be produced?

Step1: Write the balanced equation.

Solution:

Step2: Write the molar ratio.

Step3: Look at the given and the required.

Suppose we have 3.00 mol of N2 reacting with sufficient H2, how many moles of NH3 will be produced?

Step4: Use the molar ratio to find the moles of the required compound.

Steps:

Ø  Step1: Write the balanced equation.

Ø  Step2: Write the molar ratio. Ø  Step3: Look at the given and

the required. Ø  Step4: Use the molar ratio to

find the moles of the required compound.

Example 2: We want to produce 8 mole of NH3. How many moles of nitrogen would be required?

Summery:

Steps for mole to mole stoichiometry:

Ø  Step1: Write the balanced equation. Ø  Step2: Write the molar ratio. Ø  Step3: Look at the given and the required. Ø  Step4: Use the molar ratio to find the moles of the required compound.