InterviewSolution
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InterviewSolution
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State the products of electrolysis obtained on the cathode and the anode in the following cases: (i) A dilute solutoin of `H_(2)SO_(4)` with platinum electrodes (ii) An aqueous solution of `AgNO_(3)` with silver electrodes. |
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Answer» (i) `H_(2)SO_(4)(aq)to2H^(+)(aq)+SO_(4)^(2-)(aq)," "H_(2)OhArrH^(+)+OH^(-)` At cathode: `H^(+)+etoH,H+HtoH_(2)(g)` At anode: `OH^(-)toOH+e^(-),4OHto2H_(2)O(l)+O_(2)(g)` Thus, `H_(2)` is liberated at the cathode and `O_(2)` at anode. (ii) `AgNO_(4)(s)+aqtoAg^(+)(aq)+NO_(3)^(-)(aq)," "H_(2)OhArrH^(+)+OH^(-)`. At cathode. `Ag^(+)` ions ahve lower discharge potential than `H^(+)` ions. hence, `Ag^(+)` ions will be deposited on the cathode `(Ag^(+)+e^(-)toAg)` At anode. Ag anode will be attached by `NO_(3)^(-)` ions. hence, Ag anode will dissolve to form `Ag^(+)` ions in the solution `(AgtoAg^(+)+e^(-))` |
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