Question

The treatment of an aqueous solution of 3.74 g of Cu(NO₃)₂ with excess KI results in a brown solution along with the formation of a precipitate. Passing H₂S through this brown solution gives another precipitate X. The amount of X (in g) is ________.

[Given: Atomic mass of H = 1, O = 16, Na = 23 , P = 31, S = 32 , Cu = 63]

Answer 1

Mass of 'S' = 0.01 x 32 = 0.32