Q16 of 79 Page 3

Write chemical equations for reactions taking place when
i) Cinnabar is heated in air.
ii) Concentrated sulphuric acid and sulphur are heated together. Calcium metal reacts with water.

i) Cinnabar is heated in air
2HgS + 3 O2 (g) 2HgO(s) + 2SO2 ii) Calcium metal reacts with water.
Ca(s) + 2H2O (l) Ca(OH)2(aq) + H2 (g).

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