9.03.9 Past Paper Qs & A

2021

2020

2019

2018

Older

  • Use Sulphuric acid

  • Heat acid

  • add MgO or Mg(OH)2 or MgCO3 powder

  • to acid and stir until no more dissolves

  • Filter off excess powder

  • Allow filtrate to evaporate

  • H2SO4 + MgO --> MgSO4 + H2Oor

  • or H2SO4 + Mg(OH)2 --> MgSO4 + 2H2O

  • or H2SO4 + MgCO3 --> MgSO4 + H2O + CO2