What happens when (a) Solid sodium hydrogen carbonate is heated, (b) Chlorine gas is passed through dry
What happens when (a) Solid sodium hydrogen carbonate is heated, (b) Chlorine gas is passed through dry slaked lime, (c) Gypsum is heated to a temperature of 373 K?
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(a) When Solid sodium hydrogen carbonate is heated from sodium chloride Na2CO3.10H2O (washing soda).
2NaHCO3 --------Heat----------> Na2CO3 +H2O+CO2
(b) when Chlorine gas is passed through dry slaked lime, Bleaching powder is produced. Bleaching powderis represented as CaOCl2, though the actual composition is quite complex.
Ca(OH)2 + Cl2 → CaOCl2 + H2O
(c) if Gypsum is heated to a temperature of 373 K it forms plaster of Paris, CaSO4 1/2 H2O
CaSO4 2H2O --- -373 K ------> CaSO4 1/2H2O + 3/2 H2O
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