Explanation Faraday’s second law of electrolysis states that for a given quantity of electricity (electric charge), the mass of an elemental material changed at an electrode is directly proportional to the element’s equivalent weight. The equivalent weight of a substance is defined as the molar mass of that substance divided by its valency. According to the given information m Cu + m Cd = 50.36 g m Cd = 50.36 g − m Cu However, according to Faraday’s law m Cu m Cd = Eq . Wt . of Cu Eq . Wt . of Cd The equivalent weights of Cu and Cd are as follows: E q . w e i g h t o f C u = 63.546 g / m o l 2 = 31.77 g / m o l E q . w e i g h t o f C d = 112.411 g / m o l 2 = 65

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Chapter 19, Problem 134E

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Interpretation: The mass of CuSO₄ that was present in the given original mixture is to be determined.

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Chapter 19, Problem 133E

Chapter 19, Problem 135E

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The mass of CuSO 4 that was present in the given original mixture is to be determined.

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Interpretation: The mass of CuSO4 that was present in the given original mixture is to be determined.

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Chapter 19 Solutions

Interpretation: The mass of CuSO₄ that was present in the given original mixture is to be determined.