Question

why we can't treated
oxalic acid with potassium dichromate​

Answer 1

Answer:

Some of the oxalic acid is oxidized to CO2 while the dichromate is reduced to Cr+++. Then three oxalates chelate the chromium and you can crystallize a beautiful potassium tris oxalato chromium salt K3Cr (C2O4)3. The equation does not balance nicely because there is a deficiency of potassium, so there will be Cr+++ left in solution. It works better with potassium chromate K2CrO4 (more potassium).

Explanation:

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Answer 2

Answer:

We can't treat oxalic acid with potassium dichromate as

Some of the oxalic acid is oxidized to CO2 while the dichromate is reduced to Cr+++. Then three oxalates chelate the chromium and you can crystallize a beautiful potassium tris oxalato chromium salt K3Cr (C2O4)3.