A metal carbonate X on reacting with an acid gives a gas whichwhen passed through a solution Y gives the carbonate back. Onthe other hand, a gas G that is obtained at anode duringelectrolysis of brine is passed on dry Y, it gives a compound Z,used for disinfecting drinking water. Identity X, Y, G and Z. Also,write the chemical reactions involved
Question
A metal carbonate X on reacting with an acid gives a gas whichwhen passed through a solution Y gives the carbonate back. Onthe other hand, a gas G that is obtained at anode duringelectrolysis of brine is passed on dry Y, it gives a compound Z,used for disinfecting drinking water. Identity X, Y, G and Z. Also,write the chemical reactions involved
Solution
The metal carbonate X is Sodium Carbonate (Na2CO3). The solution Y is Lime Water (Ca(OH)2). The gas G is Chlorine (Cl2). The compound Z is Bleaching Powder (CaOCl2).
Here are the chemical reactions involved:
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Sodium Carbonate reacts with an acid (let's take Hydrochloric Acid for example) to produce Sodium Chloride, Water, and Carbon Dioxide.
Na2CO3 + 2HCl -> 2NaCl + H2O + CO2
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Carbon Dioxide is passed through Lime Water, it turns the Lime Water milky due to the formation of Calcium Carbonate.
Ca(OH)2 + CO2 -> CaCO3 + H2O
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Chlorine gas is obtained at the anode during the electrolysis of brine (Sodium Chloride solution).
2Cl- -> Cl2 + 2e-
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Chlorine gas is passed over dry slaked lime (Calcium Hydroxide) to form Bleaching Powder.
Ca(OH)2 + Cl2 -> CaOCl2 + H2O
The compound Z, Bleaching Powder, is used for disinfecting drinking water.
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