what happens when (a)an excess of co2 passes through lime water. (b) Gypsum is heated at 373 k. (c) sodium hydrogen carbonate is heated. (d) electricity is passed through an aqueous solution of sodium chloride. (e) dry chlorine is passed over slaked lime.
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(a) When CO2 is passed through lime-water, it turns milky due to the formation of an insoluble precipitate of Calcium Carbonate. ... If you pass excess CO2 through lime-water, the CaCO3 reacts with the excess CO2 and water to form calcium hydrogen carbonate or calcium bicarbonate.
(b) When gypsum is heated at 373 K, it loses its water of crystallization or all the water molecules and becomes calcium sulphate hemihydrate. Gypsum is converted to “Plaster of Paris”. ... On being further heated beyond 373 K, gypsum gives a product known as Gamma “Anhydrite”.
(c) Sodium hydrogen carbonate (also known as sodium bicarbonate or bicarbonate of soda) has the chemical formula NaHCO3. When it is heated above about 80°C it begins to break down, forming sodium carbonate, water and carbon dioxide. This type of reaction is called a thermal decomposition.
(d) When electricity is passed through an aqueous solution of sodium chloride, it gives hydrogen, chlorine and sodium hydroxide as a product. This process is called as Electrolysis of Brine.
(e) When Chlorine gas is passed through dry slaked lime ,it is rapidly absorbed,forming bleaching powder or chloride of Lime. The reaction is: Ca(OH)2+Cl=CaOCl2+H2O.
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Answer:
(a) calcium bicarbonate is formed
(b) plaster of Paris is formed
(c) washing soda is formed
(d) Sodium Hydroxide is formed
(e) Bleaching powder is formed.
Explanation:
Refer attachment for reactions.
