Questions
An electrolytic cell is set up to obtain pure copper from an impure rod of copper. The electrolyte solution contains both copper (II) sulfate and sulfuric acid. Impure rod of the copper, Electrode I, contains impurities such as zinc (22%), cobalt (5.8%), silver(2%), gold(1.2%), nickel(1.8%) and iron(12.3%) and inert materials which are non oxidizable. The cell voltage is adjusted so that only copper is deposited on Electrode II. Sludge, which contains some of the solid metal impurities present in the copper rod, forms beneath Electrode I. The other impurities remain in solution as ions. The diagram below represents the cell.
Which one of the following graphs shows the change in mass of Electrode-I over a period of time, starting from the moment the power supply is connected?
detailed solution
Correct option is D
m vs t should change the slop over time due to oxidation of different metals at different times.Similar Questions
The conductivity of a saturated solution of is at 25°C. Conductivity of water is . What is the approximate molar conductivity of ion at infinite dilution, given molar conductivity of Ag+ ions at infinite dilution is and
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