Question about chromate-dichromate equilibrium?

HelloMotto

Ok so when i add HCl to a chromate solution, it turns orange (dichromate) because the equilibrium shifts to the right, inorder to reduce the excess hydrogen ions from the HCl Acid.

But when I add HCl to dichromate, the color changes the same. How do i explain this phenomenon.

and is this the right equation?


2[CrO4]-2 + [H]+ <---> [Cr2O7]-2 + H2O

Borek

Equation is OK.

Take a look at it - what would you expect if you dissolve dichromate in pure water?