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प्रश्न
State your observation of the following case:
At the cathode when acidified aqueous copper sulphate solution is electrolyzed with copper electrodes.
उत्तर
Acidified aqueous copper sulphate solution is electrolysed with copper electrodes by electrolysis. The electrolysis of an aqueous solution of copper sulphate using copper electrodes (i.e. using active electrodes) results in the transfer of copper metal from the anode to the cathode during electrolysis. Copper sulphate is ionised in aqueous solution.
Chemical equation: \[\ce{CuSO4 -> Cu^{2+} + SO^{2-}4}\]
The positively charged copper ions migrate to the cathode, where each gains two electrons to become copper atoms deposited on the cathode.
\[\ce{Cu^{2+} + 2e- -> Cu}\]
Hence, the colour of copper sulphate changes from blue to colourless.
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संबंधित प्रश्न
Give reasons why Sodium Chloride will conduct electricity only in the fused or aqueous solution state.
State the electrode reaction at the anode during electrolysis of:
sodium chloride solution.
State the electrode reaction at the anode during electrolysis of:
Fused lead bromide.
State the electrode reaction at the anode during electrolysis of:
magnesium chloride (molten).
Give reason for the following:
In the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification.
Define the term : Electrolysis
State your observation for the following electrolytic reaction:
Solid copper sulphate is electrolysed between platinum electrodes.
Write the equations of the reactions which take place at the cathode and anode when acidified water is electrolyzed.
Write the equations of the reactions which take place at the cathode and anode when acidified water is electrolyzed.
Give reason for the following:
Potassium is not extracted by electrolysis of its aqueous salt solution.
