What is the change of oxidation state of Cr in potassium dichromate as a strong oxidising agent in a

Question

What is the change of oxidation state of Cr in potassium dichromate as a strong oxidising agent in acidic solution?

Professor PC Thomas Classes · Answer

In acidic medium, $	ext{Cr}_2	ext{O}_7^{2-}$ (+6) reduces to $	ext{Cr}^{3+}$ (+3). Change is 3.