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Which compound forms both hydrogen and oxygen at the electrodes when a concentratedaqueous solution is electrolyzed?A. KIB. NaClC. H 2 SO4D. AgNO

Question

Which compound forms both hydrogen and oxygen at the electrodes when a concentratedaqueous solution is electrolyzed?A. KIB. NaClC. H 2 SO4D. AgNO

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Solution

The compound that forms both hydrogen and oxygen at the electrodes when a concentrated aqueous solution is electrolyzed is H2SO4 (Sulfuric Acid).

Here's the step by step process:

  1. When sulfuric acid is electrolyzed, it ionizes into two hydrogen ions (H+) and one sulfate ion (SO4^2-).

  2. At the cathode (negative electrode), hydrogen ions gain electrons (reduction process) to form hydrogen gas. The half-reaction is: 2H+ + 2e- -> H2

  3. At the anode (positive electrode), water molecules lose electrons (oxidation process) to form oxygen gas and hydrogen ions. The half-reaction is: 2H2O -> O2 + 4H+ + 4e-

  4. Therefore, both hydrogen and oxygen gases are formed at the electrodes during the electrolysis of sulfuric acid.

So, the correct answer is C. H2SO4.

This problem has been solved

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