1.

Electrolysis of a solution of HSO_4^(-) ions produces S_2O_2^(--), Assuming 75% current efficiency , what current should be employed to achieve a production rate of 1 mole of S_2O_6^(--) per hour ?

Answer»

71.48 A
35.7 A
142.96 A
285.93 A

Solution :`2HSO_4^(-)toS_2O_8^(--)+2H^(+)+2e^(-)`
so REQUIRED rate =1 mole / HR
2 mole of `e^(-)`/hr
`=(2xx96500)/(3600 sec)=(2xx965)/36A=53.61 A`
so required CURRENT =`4/3xx53.61 A=71.48 A`


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