Question

starting with calcium carbonate,describe how a sample of calcium sulphate can be prepared

Answer 1

Dissolving CaCO3 in sulphuric acid (H2SO4) solution, you'll get CaSO4 salt CaCO3 (s) + H2SO4 (aq) → CaSO4 (s) + CO2 (g) + H2O (l)

Calcium is a very strong reducing agent, its reduction potential is 2.87 V. Reduction potential of Hydrogen is 0 V

So calcium will displace hydrogen ions from suplhuric acid.

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