The gas produced at the cathode in the electrolysis of brine is _____.

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04-11-2016
Chemistry

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The gas produced at the cathode in the electrolysis of brine is _____.

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Аноним Аноним · Answer 1 · 2016-11-06T00:45:01+01:00

The gas produced at the cathode in the electrolysis of brine is HYDROGEN.

Brine is a solution of sodium chloride (NaCl) and water (H2O). The process of electrolysis involves using an electric current to bring about a chemical change and make new chemicals. The electrolysis of brine is a large-scale process used to manufacture chlorine from salt.

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BarrettArcher BarrettArcher · Answer 2 · 2019-04-15T07:53:16+02:00

Answer : The gas produced at the cathode in the electrolysis of brine is, hydrogen gas.

Explanation :

As we know that the brine is the solution of sodium chloride and water. In the process of electrolysis, new chemicals are made by using the electric current.

In the electrolysis of brine, hydrogen gas produces at the cathode which is a negative electrode and chlorine gas produces as the anode which is a positive electrode and the sodium hydroxide remains dissolved in the solution.

The two half-reaction equation are :

Reduction : [tex]2H^++2e^-\rightarrow H_2[/tex]

Oxidation : [tex]2Cl^-+2e^-\rightarrow Cl_2[/tex]

The balanced chemical reaction will be,

[tex]2NaCl(s)+2H_2O(aq)\rightarrow 2Na^+(aq)+2OH^-(aq)+Cl_2(g)+H_2(g)[/tex]

Hence, the gas produced at the cathode in the electrolysis of brine is, hydrogen gas.