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Why is K2Cr2O7 made by adding KCl to sodium dichromate solution?
ANa2Cr2O7 is insoluble
BK2Cr2O7 is more soluble
CNa2Cr2O7 is more soluble
DKCl oxidises the chromium
Answer & Solution
Correct answer: C. Na2Cr2O7 is more soluble
The less soluble potassium salt crystallises out because sodium dichromate stays in solution.
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