Practice question
Question
How many Faradays are required to deposit 0.295 g of cobalt from CoCl₂ solution? (Atomic mass of Co = 59 g/mol)
Explanation
Co²⁺ + 2e⁻ → Co . 1 mol Co (59 g) requires 2F. Moles = (0.295/59) = 0.005 mol , Charge = 0.005 × 2 = 0.01 F .
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