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Question about chromate-dichromate equilibrium?

  • Thread starter HelloMotto
  • Start date
  • #1
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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
 

Answers and Replies

  • #2
Borek
Mentor
28,326
2,713
Equation is OK.

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

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