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
frac{1}{2} 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
frac{1}{2} mark for no / incorrect balancing)