Question

Write down the observation for the following:
(i) Hydrogens sulphide gas is passed through aqueous copper sulphate solution.
(ii) Addition of BaCl₂ salt to dilute sulphuric acid
(iii) Effect of low temperature on the solubility of solution
(iv) Reaction of concentrated Hcl with Pb₂O₂ when heated
(v) Ammonia carbonate is heated

Answer 1

I) When hydrogen sulphide gas is passed through aqueous copper sulphate solution a black precipitate of copper sulphide(Cu2S) is obtained .

II) A white precipitate of barium sulphate is produced (BaSO4).

III) The solubility of a solution will increase at a low temperature .

IV) Chlorine gas will be produced .

V) When solid Ammonium Carbonate is heated, It decomposes to form ammonia gas, carbon dioxide Gas, and water vapor.