On the electrolysis of aqueous solution of Na2SO4 by using inert electrode, which of the following is deposited/released on the cathode electrode?
Correct answer: D. H2 gas is released
- A. Na is deposited
- B. O2 gas is released
- C. Neither Na or H2 is released
- D. H2 gas is released
Explanation
On the electrolysis of aqueous solution of Na2SO4 by using inert electrodes, hydrogen gas is released at the cathode electrode.The reason for this is that the standard electrode potential of hydrogen is more negative than the standard electrode potential of sodium. Therefore, the hydrogen ions in the solution will be reduced at the cathode, while the sodium ions will not.
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