9.03.9 Past Paper Qs & A
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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