An excess of sodium sulfide solution was added to 27 g of a solution with a mass fraction of copper (2) chloride of 10%.

An excess of sodium sulfide solution was added to 27 g of a solution with a mass fraction of copper (2) chloride of 10%. Determine the mass of precipitated sediment.

1) The equation for the reaction C and Cl2 + Na2S = C and S + 2 NaCl
2) Calculated mass and amount of copper chloride substance
m (C and Cl2) = 27 * 0.1 = 2.7 (g)
n (C and Cl2) = 2.7g / 135 = 0.02 mol
Found the mass of copper sulfide m (C and S) = 0.02 * 96 = 1.92 g

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