Question

In: Chemistry

Which of the following elements can be prepared by electrolysis of their aqueous salts: fluorine copper...

Which of the following elements can be prepared by electrolysis of their aqueous salts: fluorine copper nitrate calcium silver iodine potassium

Please explain as simply as possible as well

Solutions

Expert Solution

fluorine –answer

Fluorine:

it can be prepared by the electrolysis of liquid HF

More positive (less negative) the standard reduction potential, greater the oxidizing power.

, F- has greater oxidizing power than water.

Hence

water will be oxidized to  O2at anode

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silver and copper

metal by electrolysis of an aqueous solution of its salts .

as silver and copper have higher reduction potential than water

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calcium-------- metal that cannot be obtained by electrolysis of an aqueous solution of its salts is Ca.

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Potassium--------- will react with water. And forms hydroxide solutions,

Electrolysis of hydroxide solutions, any metal released at the cathode will immediately react with the water

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