Question

preparation of standard solution of oxalic acid or potassium dichromate.​

Answer 1

Answer:

K2Cr2O7 → 2 K+ + Cr2O.

Explanation:

Potassium dichromate is usually prepared by the reaction of potassium chloride on sodium dichromate. Alternatively, it can be also obtained from potassium chromate by roasting chromite ore with potassium hydroxide. It is soluble in water and in the dissolution process it ionizes: K2Cr2O7 → 2 K+ + Cr2O.