ICSE Class 10 Chemistry Question 26 of 42

Practical Chemistry — Question 27

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Question

Question 2(2015)

State one relevant observation : When hydrogen sulphide gas is passed through lead acetate solution.

Answer

A silvery black precipitate of PbS is formed.

Pb(CH3COO)2 [colourless] + H2S ⟶ PbS [black] + 2CH3COOH