Titration Calculations

• Determining the concentration of an acid or alkali


  1. Write C=, N=, V= for acid and alkali

  2. Fill in known information

  3. Calculate moles of alkali

  4. Use mole ratio to calculate moles of acid

  5. Calculate concentration of acid in mol/dm³

  6. Calculate concentration of acid in g/dm³
• Concentration


  Moles per decimeter cubed
• Concentration


  Moles per decimeter cubed
• Concentration


  Grams per decimeter cubed
• Concentration


  Grams per decimeter cubed
• Titration calculation


  1. Convert volumes to decimeters cubed

  2. Calculate moles of one solution

  3. Use mole ratio to calculate moles of other solution

  4. Divide moles by volume to get concentration in moles per decimeter cubed

  5. Multiply moles per decimeter cubed by relative formula mass to get concentration in grams per decimeter cubed
• Sample question: 20 cm³ hydrochloric acid neutralized 25 cm³ calcium hydroxide 0.1 mol/dm³


  1. Write C=, N=, V= for acid and alkali

  2. Fill in: [Ca(OH)₂] = 0.1 mol/dm³, V = 0.025 dm³, V(HCl) = 0.02 dm³

  3. Calculate moles Ca(OH)₂: 0.1 x 0.025 = 0.0025 mol

  4. Use 2HCl:Ca(OH)₂ ratio, so 0.005 mol HCl

  5. Concentration HCl = 0.005/0.02 = 0.25 mol/dm³

  6. Concentration HCl = 0.25 x 36.5 = 9.125 g/dm³
• Titration


  • Used to determine the concentration of an acid or alkali
• Calculating concentration of acid


  1. Convert volumes to decimeters cubed

  2. Calculate moles of sodium hydroxide

  3. Use mole ratio to calculate moles of hydrochloric acid

  4. Divide moles of acid by volume to get concentration in moles per decimeter cubed

  5. Multiply moles per decimeter cubed by relative formula mass to get concentration in grams per decimeter cubed
• Calculating concentration of sulfuric acid


  1. Convert volumes to decimeters cubed

  2. Calculate moles of calcium hydroxide

  3. Use mole ratio to calculate moles of sulfuric acid

  4. Divide moles of acid by volume to get concentration in moles per decimeter cubed

  5. Multiply moles per decimeter cubed by relative formula mass to get concentration in grams per decimeter cubed