Electrolysis

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Chemistry

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10th Grade

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Hard

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Electrolysis of sodium chloride solution

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Electrolysis

Energy change in the electrolytic cell - Electrical energy is converted into chemical energy

Electrolysis of Molten Sodium chloride (NaCl)

NaCl --> Na⁺+ Cl^-

Reaction at Cathode: Na⁺ + 1e- --> Na

Reaction at Anode: 2Cl^- --> Cl₂+ 2e^-

By the electrolysis of molten sodium chloride, Sodium(Na) is formed at the cathode and chlorine((Cl₂) at the anode

Electrolysis of Sodium chloride Solution

NaCl solution contains Na⁺ ions, Cl^- ions and H₂O(water)

Reaction at Cathode: 2H₂O + 2e^- --> H₂ + 2OH^-

^{Reaction at Anode: 2Cl- --> Cl}₂^{+ 2e-}

^{Thus, Hydrogen(H}₂^{) is formed at Cathode, and Chlorine(Cl}₂^{) at the Anode.}

^{The remaining solution is sodium hydroxide (NaOH)}

Multiple Choice

When an aqeous solution of sodium chloride is electrolysed, .......... is obtained at the cathode

Sodium

Chlorine

Hydrogen

Sodium hydroxide

Multiple Choice

The equation for the reaction at the cathode during the electrolysis of NaCl solution is

Na⁺ + 1e- --> Na

2H₂O + 2e^- --> H₂ + 2OH^-

2Cl- --> Cl2 + 2e-

Electrolysis

Energy change in the electrolytic cell - Electrical energy is converted into chemical energy

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