How do we differentiate solutions of #"sodium dichromate"# and #"chromium (III+)"# ion?

1 Answer
anor277
Apr 23, 2017

Perhaps you should tell us this...........

Explanation:

Dichromate ion is #Cr_2O_7^(2-)#. An oxygen bridges 2 metal centres to give a complex ion that I could represent as:

#""^(-)O(""_2O=)Cr-O-Cr(=O)_2O^(-)#.

The oxidation state of each chromium centre is #VI+# (the maximum oxidation number), and this reagent is commonly used an oxidant, and we see the colour of bright orange (the dichromate ion) change to green, #Cr^(3+)#.

sites.google.com

Dichromate salts are typically a beautiful orange colour:

en.tjfuqiang.com

Related questions
See all questions in Sigma Bonds
Impact of this question
2027 views around the world
You can reuse this answer
Creative Commons License