Question

state two uses of electrelysis​

Answer 1

Answer:

Electrolysis is used in industry for the production of many metals and non-metals (e.g., aluminium, magnesium, chlorine, and fluorine).

Electrolysis is commonly employed for coating one metal with another. The method of coating one metal with another using an electric current is called electroplating.

Answer 2

Answer:

tow use of elecctrelysis

Explanation:

•Purification of Copper

Purification of copper is carried out using CuSO4 solution as electrolyte, the impure copper as the anode and the cathode a strip of pure copper. During the process, the anode (impure copper) decomposes and goes into solution as Cu2+,

i.e. Anode reaction: Cu(s) → Cu2+(aq) + 2e-(aq) - oxidation reaction.

While at the cathode, pure copper is deposited i.e. Cathode reaction:

Cu2+(aq) + 2e-(aq) → Cu(s) - reduction reaction

The impurities, which include silver (Ag) and gold (Au) are not discharged in the process, but collect in a sludge at the bottom of the cell and are recovered from it.

•Production of NaOH

The electrolysis of conc. sodium chloride solution using carbon electrodes results in the solution being highly concentrated of sodium hydroxide. Sodium hydroxide may be prepared commercially by this method. This process has earlier been treated here.

Also, using mercury cathode, Na+ is discharged, and then reduces to the metal. i.e. Na+(aq) + e-(aq) → Na(s)

Then Na(s) combines with the mercury to for a mixture - sodium amalgam Na/Hg.

The sodium amalgam is run into water, resulting in the reaction of sodium with water to form NaOH solution, while the mercury is dissociated from it.