4
Translate the following statements into chemical equation and then balance them :
(a) Water is added to quicklime
(b) Burning of natural gas
(c) Thermal decomposition of ferrous sulphate
(a) Water is added to quicklime
(b) Burning of natural gas
(c) Thermal decomposition of ferrous sulphate
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(a) $\ce{CaO(s) + H2O(l) -> Ca(OH)2 + Heat}$ (1 Mark)
(b) $\ce{CH4(g) + 2O2(g) -> CO2(g) + 2H2O(g)}$ (1 Mark)
(c) $\ce{2FeSO4(s) ->[Heat] Fe2O3(s) + SO2(g) + SO3(g)}$ (1 Mark)
(deduct ½ mark for no / incorrect balancing)
(b) $\ce{CH4(g) + 2O2(g) -> CO2(g) + 2H2O(g)}$ (1 Mark)
(c) $\ce{2FeSO4(s) ->[Heat] Fe2O3(s) + SO2(g) + SO3(g)}$ (1 Mark)
(deduct ½ mark for no / incorrect balancing)