Slide 1: Stoichiometry
The study of amounts in a chemical reaction
Root words:
Stoicheion – element
Metron - measure
Slide 2: Stoichiometry
Steps
Balance Chemical Equation
Determine mole ratios
Pick the correct mole ratio and multiply it by the moles of substance given.
Mole Ratio : Mole Ratio A mole ratio is basically a fraction of the moles of one substance in a chemical reaction over the moles of another substance in the equation.
Mole Ratios : Mole Ratios 2 H2(g) + O2(g) 2 H2O(l)
Slide 5: Mole-mole calculations
N2 + 3 H2 2 NH3
If we have 2.00 mol of N2 reacting with sufficient H2, how many moles of NH3 will be produced?
Slide 6: Mole-mole calculations
N2 + 3 H2 2 NH3
If we have 2.00 mol of N2 reacting with sufficient H2, how many moles of NH3 will be produced?
Step 1: Write the number and unit given.
Slide 7: Mole-mole calculations
N2 + 3 H2 2 NH3
If we have 2.00 mol of N2 reacting with sufficient H2, how many moles of NH3 will be produced?
Step 2: Multiply by correct mole ratio to cancel out mole N2 and to get mole NH3 on top. x =
Slide 8: Mole-mole calculations
N2 + 3 H2 2 NH3
If we have 2.00 mol of N2 reacting with sufficient H2, how many moles of NH3 will be produced?
Step 3: Cancel out the units that appear at the top and the bottom of the fraction. x
Slide 9: Mole-mole calculations
N2 + 3 H2 2 NH3
If we have 2.00 mol of N2 reacting with sufficient H2, how many moles of NH3 will be produced?
Step 4: Multiply the numbers on the top and divide by what is on the bottom. x =
Slide 10: Mole-mole calculations
N2 + 3 H2 2 NH3
Suppose 6.00 mol of H2 reacted with sufficient nitrogen. How many moles of ammonia would be produced?
Slide 11: Mole-mole calculations
N2 + 3 H2 2 NH3
Suppose 6.00 mol of H2 reacted with sufficient nitrogen. How many moles of ammonia would be produced? x =
Slide 12: Mole-mole calculations
N2 + 3 H2 2 NH3
We want to produce 2.75 mol of NH3. How many moles of nitrogen would be required?
Slide 13: Mole-mole calculations
N2 + 3 H2 2 NH3
We want to produce 2.75 mol of NH3. How many moles of nitrogen would be required? x =