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

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

Given: m (mass of copper released at the cathode) = 1.5 g (in SI m = 1.5 * 10-3 kg); t (duration of the experiment (electrolysis)) = 20 min (in SI t = 1200 s); I (current) = 4 A.

To determine the electrochemical equivalent of copper according to the experiment, we will use the first Faraday law: m = k * I * t, whence k = m / (I * t).

Let’s calculate: k = 1.5 * 10-3 / (4 * 1200) = 31.25 * 10-8 kg / C.

Answer: The electrochemical equivalent of copper, according to the experience, is 31.25 * 10-8 kg / C.