This is a solution of potassium dichromate, K2Cr2O7, in water.

When a colorless solution of tin(II) chloride, SnCl2, is added the orange color becomes green.

Adding tin(II) chloride to potassium dichromate yields a green solution.

 

Let's write a balanced equation for this oxidation-reduction reaction.


(c) Copyright 2000. All rights reserved.