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Standard XII

Chemistry

Faraday's First Law

A solution of...

Question

A solution of Ni(NO₃)₂ is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode?

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Solution

Given,

Current = 5A

Time = 20 × 60 = 1200 s

Charge = current × time

= 5 × 1200

= 6000 C

According to the reaction,

Nickel deposited by 2 × 96487 C = 58.71 g

Therefore, nickel deposited by 6000 C

= 1.825 g

Hence, 1.825 g of nickel will be deposited at the cathode.

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A solution of Ni(NO3)2 is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode?

Given, Current = 5A Time = 20 × 60 = 1200 s Charge = current × time = 5 × 1200 = 6000 C According to the reaction, Nickel deposited by 2 × 96487 C = 58.71 g Therefore, nickel deposited by 6000 C = 1.825 g Hence, 1.825 g of nickel will be deposited at the cathode.

A solution of Ni(NO₃)₂ is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode?

Given,

Current = 5A

Time = 20 × 60 = 1200 s

Charge = current × time

= 5 × 1200

= 6000 C

According to the reaction,

Nickel deposited by 2 × 96487 C = 58.71 g

Therefore, nickel deposited by 6000 C

= 1.825 g

Hence, 1.825 g of nickel will be deposited at the cathode.