Question

During the electrolytic decomposition of water, the electrolyte is acidified.
Why?

Answer 1

Answer:

Electrolysis of water is the decomposition of water into oxygen and hydrogen gas due to the passage of an electric current.

This technique can be used to make hydrogen gas, a main component of hydrogen fuel, and breathable oxygen gas, or can mix the two into oxyhydrogen, which is also usable as fuel, though more volatile and dangerous.

In pure water at the negatively charged cathode, a reduction reaction takes place, with electrons (e−) from the cathode being given to hydrogen cations to form hydrogen gas. The half reaction, balanced with acid, is:

Reduction at cathode: 2 H+(aq) + 2e− → H2(g)

At the positively charged anode, an oxidation reaction occurs, generating oxygen gas and giving electrons to the anode to complete the circuit:

Oxidation at anode: 2 H2O(l) → O2(g) + 4 H+(aq) + 4e−

the ions provided by the acid greatly increase the electrical conductivity of the water, and this allows the decomposition of water to occur at a much increased rate.

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Answer 2

Answer:

The solution is acidified so that the conductivity of the solution is increased and the electrolysis processs takes place at a faster rate . By increasing the conductivity the electons move at a faster rate .