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The active metals in columns 1 and 2 of a wide form periodic table cannot be reduced to elemental metals by electrolysis in aqueous electrolytic cells, because any atom of elemental active metal that might be transiently produced, by reduction of a positive ion of the active metal to a neutral atom, will react almost instantaneously with two nearby water molecules to produce hydrogen gas, hydroxyl ions, and regenerated positive ions of the active metal.

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10y ago
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11y ago

in aqueous medium, H2 is evolved at the cathode, instead of depositing metals of group 1 or 2.

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11y ago

because they produce H2 gas at the cathode instead of being getting deposited.

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Q: Why can the active metals in groups 1 and 2 in the periodic table not be reduced in aqueous electrolytic cells?
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