Guest

In aqueous solution of potassium dichromate the chromate and dichromate ions will be in equillibrium at what ph?

In aqueous solution of potassium dichromate the chromate and dichromate ions will be in equillibrium at what ph?

Grade:12

1 Answers

SAGAR SINGH - IIT DELHI
879 Points
12 years ago

Dear shashank,

The equation for the equilibrium is:
2(CrO4)2- + 2H+ <--> (Cr2O7)2- + H2O
At low pH the concentration of H+ is high and the position of equilibrium is moved to the right and the solution becomes more orange (i.e. more dichromate).
At high pH the concentration of H+ is low and the position of equilibrium is moved to the left and the solution becomes more yellow (i.e. more chromate).
At pH7, the position of equilibrium lies between these two extremes.

We are all IITians and here to help you in your IIT JEE preparation.

All the best.

 If you like this answer please approve it....

win exciting gifts by answering the questions on Discussion Forum

 

Sagar Singh

B.Tech IIT Delhi

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free