An ammeter connected in series with an electrolytic bath shows a current of 1.5 A.

An ammeter connected in series with an electrolytic bath shows a current of 1.5 A. Are the ammeter readings correct if 0.316 g of copper has been deposited on the cathode in 10 minutes. the electrochemical equivalent of copper is 0.33 * 10 ^ -6 kg / C.

The mass of copper m, which is released at the electrode, is proportional to the electrochemical equivalent k, the current I and the time of passage of the current t (Faraday’s law):

m = kIt = 0.33 * 10 ^ (- 6) kg / C * 1.5 A * 600 s = 0.000297 kg = 0.297 g.

The calculated mass turned out to be less than that actually obtained (0.317 g), which indicates incorrect readings of the ammeter. The current value was actually greater than the ammeter indicated.

Answer. The ammeter reading is too low.