Why ph increased in sodium dichromate electrolytes 2% solution?
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The potassium dichromate (K2Cr2O7), solution contain dichromate (Cr2O72- ion . The ion is less basic and so increase in PH increase in the basicity of the compound.
In simple words, by decreasing hydrogen ion concentration the dichromate ion is converted to chromate ion or vice versa.
Cr2O72- +2OH- à 2CrO42- +H2O
2CrO42- +2H+ à Cr2O72- +H2O
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