Mole to mole calculations:
- Coefficients in balanced equations represent the number of moles.
- They can also be conversion factors.
Example 1: When 2.1x10^-3 mol of aluminum hydroxide react with sulphuric acid, how many moles of aluminum sulphate are produced.
Step 1: Write the chemical equation -> Al(OH)3 + H2SO4 -> Al2(SO4)3 + HOH
Step 2: Balance the equation -> 2Al(OH)3 + 3H2SO4 -> Al2(SO4)3 + 6HOH
Step 3: Conversion -> 2.1x10^-3 mol of Al(OH)3 x 1 mol Al2(SO4)3 / 2 mol of Al(OH)3 = 1.0 x 10^-3 mol of Al2(SO4)3