Copper(II) sulfide, CuS, is used in the development of aniline black dye in textile printing. What is the maximum mass of CuS which can be formed when 38.0 mL of 0.500 M CuCl2 are mixed with 42.0 mL of 0.600 M (NH4)2S? Aqueous ammonium chloride is the other product.

Question

Quizplus · Accepted Answer

The reaction is CuCl2 + (NH4)2S → CuS + 2 NH4Cl. Calculate moles of CuCl2 (0.019 mol) and (NH4)2S (0.0252 mol). CuCl2 is the limiting reactant. Moles of CuS formed = moles of CuCl2 = 0.019 mol. Mass of CuS = 0.019 mol × 95.61 g/mol = 1.82 g.

Copper(II) Sulfide, CuS, Is Used in the Development of Aniline