Q.

An acidic solution of dichromate is electrolyzed for 8 minutes using 2A current. As per the following equation Cr2O72−+14H+ +6e−→ 2 Cr3+ + 7 H2OThe amount of Cr3+ obtained was 0.104 g. The efficiency of the process (in%) is (Take : F=96000 C, At. Mass of chromium =52)_____

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answer is 60.31.

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Detailed Solution

Let ‘x’ be the efficiency96500C→523gms?→0.104gm0.10452/3×96500C Efficiency =0.10452/3×965008×60×2×100=60.31
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An acidic solution of dichromate is electrolyzed for 8 minutes using 2A current. As per the following equation Cr2O72−+14H+ +6e−→ 2 Cr3+ + 7 H2OThe amount of Cr3+ obtained was 0.104 g. The efficiency of the process (in%) is (Take : F=96000 C, At. Mass of chromium =52)_____