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
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:
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When sulfuric acid is electrolyzed, it ionizes into two hydrogen ions (H+) and one sulfate ion (SO4^2-).
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At the cathode (negative electrode), hydrogen ions gain electrons (reduction process) to form hydrogen gas. The half-reaction is: 2H+ + 2e- -> H2
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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-
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Therefore, both hydrogen and oxygen gases are formed at the electrodes during the electrolysis of sulfuric acid.
So, the correct answer is C. H2SO4.
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