Mole to Mole Conversions

- Coefficients in balanced equations tell us the number of moles reacted or produced
- They can also be used as conversion factors
ex 3X + Y -> 2Z    ratios :  x to y 3:1, x to z 3:2, y to z 1:2

- What you need over what you have (stoichiometric ratio)
ex

if 0.15mol of methane are consumed in a combustion reaction how many moles of CO2 are produced?
CH4 + 2O2 -> CO2 + 2H2O
0.15 * 1/1 = 0.15 mol of CO2


When 2.1*10^-2 mol of Aluminum Hydroxide react with Sulphuric acid how many moles of Aluminum sulphate are produced?
2Al(OH)3 + 3H2SO4 -> Al2(SO4)3 + 6H2O
2.1*10^-2 * 1/2 = 1.1*10^-2 moles of aluminum sulphate 


How many moles of bauxite (Aluminum Oxide) are required to produce 1.8mol of pure aluminum?
2Al2O3 -> 4Al + 3O2
1.8 * 2/4 = 0.90 mol of aluminum


- JanCarlo Paysan