Question

Name two metals which are purified by electrolytic refining. Mention the anode,cathode and the electrolyte used in the refining process. At which electrode would the pure metal be deposited

Answer 1

Answer:

Many metals, such as copper, zinc, tin, nickel, silver, gold etc. are refined by electrolysis. In this process, the impure metal is made the anode and a thin strip of pure metal is made the cathode. The solution of the metal salt is used as an electrolyte.

Answer 2

Gold, silver and copper is used for electrolytic refining.

Explanation:

• Gold recovers using electrolytic process, here an electrolyte used is hydrochloric acid.
• Above 99.5% purity of a thin gold sheet is the cathode and anode is the gold alloy.
• In refining process crude silver is the anode and refined silver is the cathode. The process is similar to gold except in a nitric acid the silver anodes will be dissolved.
• Copper extracted from ores by electrolysis which involves the copper of cathode to be deposited and lead coated as anode. Here, purification involved as the use of copper sulfate, cathode is the copper strips it is highly purified and anodes is copper which is impure.

To learn more;

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