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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?

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?

Grade:8

2 Answers

Gaurav
askIITians Faculty 164 Points
9 years ago
255-602_Capture.PNG
Yash Chourasiya
askIITians Faculty 256 Points
3 years ago
Dear Student

I = 5A
Time = 20×60 =1200s
∴Charge=current×time
= 5×1200
= 6000C
According to the reaction.
Ni2+(aq.) + 2e- → Ni(s)
Nickel deposited by (2×96487)C =58.7g

∴ Nickel deposited by6000C = (58.7 × 6000​)/(2 ×96487)
= 1.825 g (at Cathode)

I hope this answer will help you.
Thanks & Regards
Yash Chourasiya

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