Question

SECTION B
18. When hydrogen sulphide gas is passed through a blue solution of copper
sulphate, the colour of the solution fades and a black precipitate is
obtained
(a) Name the type of reaction mentioned above.
(b) Why does the colour of the solution fade away?
(c) Write the chemical name of the black precipitate formed.
(d) Give the balanced chemical equation for the reaction involved.​ please give me the correct answer please

Answer 1

Answer:

a double displacement

b due to formation of black coloured CuS and colorless H2SO4

c copper sulphide

d H2S + CuSO4 --> H2SO4 + CuS

Answer 2

(a) The type of the reaction is double displacement.

The ions of the two reactant compounds are interchanged to form two products.

(b) Color of the solution fade away:

Due to formation of copper sulfide and hydrochloric acid, the color of the solution fades away.

(c) Chemical name of the black precipitate:

The precipitate formed is copper sulfide.

(d) Chemical reaction:

H₂S + CuSO₄ → CuS + H₂SO₄

The products formed are copper sulfide and hydrochloric acid.