Questions/D & F Block/Why is $$Na_2Cr_2O_...
Potassium DichromateD & F Block

Why is Na2Cr2O7Na_2Cr_2O_7 NOT used as a primary standard?.

Expert Answer

It is hygroscopic (absorbs moisture). K2Cr2O7K_2Cr_2O_7 is not.

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