(a) X is carbon dioxide; Y is calcium carbonate; Z is calcium hydrogen carbonate. (b) (i) CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l) (ii) Ca(OH)2 (aq) + CO2(g) → CaCO3(s) + H2O(l) (iii) CaCO3 (s) + H2O(l) + CO2 (g) → Ca[HCO3]2 (aq).

Q. 444.0( 8 Votes )

When a piece of lime

Class 10th Lakhmir Singh & Manjit Kaur - Chemistry 2. Acids, Bases and Salts

Answer :

(a) X is carbon dioxide;

Y is calcium carbonate;

Z is calcium hydrogen carbonate.

(b)

(i) CaCO₃(s) + 2HCl(aq) → CaCl₂(aq) + CO₂(g) + H₂O(l)

(ii) Ca(OH)₂ (aq) + CO₂(g) → CaCO₃(s) + H₂O(l)

(iii) CaCO₃ (s) + H₂O(l) + CO₂ (g) → Ca[HCO₃]₂ (aq).

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