Electrolysis is carried out for 2.00 h in the following cell. The platinum cathode, which has a mass of 25.0782 g, weighs 25.8639 g after the electrolysis. The platinum anode weighs the same before and after the electrolysis.

(a) Write plausible equations for the half-cell reactions that occur at the two electrodes.

(b) What must have been the magnitude of the current used in the electrolysis (assuming a constant current throughout)?

(c) A gas is collected at the anode. What is this gas, and what volume should it occupy if (when dry) it is measured at 23 °C and 755 mmHg pressure?

Transcribed Image Text:

Pt P Battery H₂SO4(aq) Anode Ammeter Pt AgNO3(aq) Cathode