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Write the balanced chemical equation for the preparation of :
(a) Sodium hydroxide by electrolysis of brine solution
(b) Sodium carbonate
(a) Sodium hydroxide by electrolysis of brine solution
(b) Sodium carbonate
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(a) $\ce{2NaCl(aq) + 2H2O(l) -> 2NaOH(aq) + Cl2(g) + H2(g)}$ (1 Mark)
(b) $\ce{2NaHCO3 ->[Heat] Na2CO3 + H2O + CO2}$ (1 Mark)
(Deduct ½ mark for no/ incorrect balancing)
(b) $\ce{2NaHCO3 ->[Heat] Na2CO3 + H2O + CO2}$ (1 Mark)
(Deduct ½ mark for no/ incorrect balancing)