When performing the experiment, copper with a mass of 1.5 g was released on the cathode in 20 minutes

| May 20, 2021 | education

When performing the experiment, copper with a mass of 1.5 g was released on the cathode in 20 minutes at a current of 4 A. Determine the electrochemical equivalent of copper from the experiment data.

We translate the values from given to the SI system:
Δt = 20 min = 1200 s.
m = 1.5 g = 0.0015 kg.
According to the first Faraday’s law, the mass of a substance that was released on the electrode during the time Δt at a current strength I is proportional to them.
m = k * I * Δt, where k is the electrochemical equivalent of a substance (the ratio of the mass of an ion to its charge)
Let us express k from this expression:
k = m / I * Δt
Let’s calculate k:
k = m / I * Δt = 0.0015 / (4 * 1200) = 3.125 * 10 ^ -7 kg / C.
Answer: k = 3.125 * 10 ^ -7 kg / C.



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