Question

If astead current of 2ampere was passed through an aqueous solution of iron 2 sulphate for 15 minutes what mass of iron would be deposited at the cathode?

Answer 1

Explanation:

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12th

Chemistry

Electrochemistry

Electrolytic Cells and Electrolysis

3 Faradays of electricity w...

CHEMISTRY

3 Faradays of electricity was passed through an aqueous solution of iron (II) bromide. The weight (in g) of iron metal (atomic weight =56 amu) deposited at the cathode is:

December 30, 2019avatar

Zameer Rohekar

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ANSWER

3 Faradays of electricity was passed through an aqueous solution of iron (II) bromide.

3 F of electricity ≡3 moles of electrons

Fe

2+

+2e

−

→Fe

2 moles of electrons gives 1 mole of Fe

3 moles of electrons gives =

2

3

moles of Fe

=

2

3

×56 =84 g

Hence, 84 g of iron metal is deposited at the cathode.