Question

Riya set up this circuit for purification of copper. What will be the nature of?

i. Plate A

ii. Plate B

iii. The solution

iv. Explain the process of purification.​

Answer 1

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(i) In plate A- Pure copper

(ii) In plate B- Impure copper

(iii) The solution – Copper sulphate solution

Electroplating is the purifying method used here. Electroplating is the process of aligning another metal onto a metal. This is accomplished using an electroplating apparatus that includes a brine solution, a battery, wires, and alligator clips that hold carbon rods attached to the metal to be electroplated and the metal to be layered.

Process of purification:-

• Take copper sulphate and two copper plates of size around 10 cm × 4 cm.
• Take 250 mL of distilled water in a clean and dry beaker. Dissolve two teaspoonfuls of copper sulphate in it.
• Add a few drops of dilute sulphuric acid to copper sulphate solution to make it more conducting.
• Clean copper plates with sandpaper. Now rinse them with water and dry them.
• Connect the copper plates to the terminals of a battery and immerse them in copper sulphate solution.
• When an electric current is passed through the copper sulphate solution, copper sulphate dissociates into copper and sulphate.
• The free copper gets drawn to the electrode connected to the negative terminal of the battery and gets deposited on it

Answer 2

Answer:

(i) In plate A- Pure copper

(ii) In plate B- Impure copper

(iii) The solution – Copper sulphate solution

Electroplating is the purifying method used here. Electroplating is the process of aligning another metal onto a metal. This is accomplished using an electroplating apparatus that includes a brine solution, a battery, wires, and alligator clips that hold carbon rods attached to the metal to be electroplated and the metal to be layered.

Process of purification:-

Take copper sulphate and two copper plates of size around 10 cm × 4 cm.

Take 250 mL of distilled water in a clean and dry beaker. Dissolve two teaspoonfuls of copper sulphate in it.

Add a few drops of dilute sulphuric acid to copper sulphate solution to make it more conducting.

Clean copper plates with sandpaper. Now rinse them with water and dry them.

Connect the copper plates to the terminals of a battery and immerse them in copper sulphate solution.

When an electric current is passed through the copper sulphate solution, copper sulphate dissociates into copper and sulphate.

The free copper gets drawn to the electrode connected to the negative terminal of the battery and gets deposited on it.

Explanation:

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