Posted by
**Val** on
.

How much time is required to electroplate 6.530 µg of chromium from a potassium dichromate solution, by using a current of 118 mA?

I thought the ratio of e- to moles chromium would be 6/2 but I guess that is wrong? I am using t= nF/A

I already made the proper conversions to grams and A's....just confused on the potassium dichromate to chromium. I have it ias KCr2O7 + 6e-==> 2CrO4^2- which is where i got the ratio to be 6/2