Q.

When an alkaline solution of K2CrO4 is treated with 3% H2O2 solution, red brown paramagnetic peroxochromate is obtained as per following equation:2K2CrO4+7H2O2+2KOH⟶2K3CrO8+8H2OThe equivalent weight of K2CrO4 for above transformation must be (assuming M is the molar mass of K2CrO4)

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Detailed Solution

Oxidation of Cr in K3CrO8 = V Cr+6⟶Cr+5Equivalent mass =M1̣
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When an alkaline solution of K2CrO4 is treated with 3% H2O2 solution, red brown paramagnetic peroxochromate is obtained as per following equation:2K2CrO4+7H2O2+2KOH⟶2K3CrO8+8H2OThe equivalent weight of K2CrO4 for above transformation must be (assuming M is the molar mass of K2CrO4)