# Why does potassium dichromate always reacts in an acidic medium?

On the other hand, potassium manganate reacts in both acidic and alkaline media.

$$\ce{Cr2O7^2- + 2OH- <=>> 2CrO4^2- + H2O}$$
• Interesting information @orthocresol. Does this mean that the $\ce{CrO4^{2-}}$ ion have no oxidative abilities despite being in chromium's highest oxidation state? – Pritt says Reinstate Monica Jun 4 '17 at 4:59