One way in which the useful metal copper is produced is by dissolving the minera

Question

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(II) carbonate, in concentrated sulfuric acid. The sulfuric acid reacts with the copper II) carbonate to produce a blue solution of copper(II) sulfate. Scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: Fe(s) + Cusodaq) Cu(s) + FeSO4(aq) Suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. He adds powdered iron to a 100. mL copper(II) suifate sample from the plant until no more copper will precipitate. He then washes, dries, and weighs the precipitate, and finds that it has a mass of 108. mg of coppertII) sulfate in the sample. Round your answer to 3 significant digits

Explanation / Answer

V = 100 mL of CuSO4 solution

mass of Copper --> 108 mg = 0.108 g

mol of Cu = mass/MW = 0.108/63.5 = 0.00170 mol of Cu

now...

V = 100 mL = 0.1 L

[Cu+2] = mol of Cu / Liter = 0.00170 /0.1 = 0.0170

[Cu+2] = [CuSO4] = 0.0170 M

change to mass per liter

1 mol of CuSO4= 159.6086

mass = M*MW = 0.0170 *159.6086 = 2.713 g of CuSO4 per liter

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