MetallurgyHardBloom L3

Question

For extraction of sodium from NaCl, the electrolytic mixture NaCl + KCl + CaCl2 is used. During extraction process, only sodium is deposited on cathode but K and Ca do not because

Options

A.Na is more reactive than K and Ca
B.Na is less reactive than K and Ca
C.NaCl is less stable than Na3AlF6 and CaCl2
D.the discharge potential of Na+ is less than that of K+ and Ca2+ ions.

Solution

Sol. Discharge potential of Na+ less than K+ and Ca+2 ion.

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