# Will potassium permanganate react with ferric chloride?

I came across a question :

Which of the following compound does not decolourise an acidified solution of $$\ce{KMnO4}$$?

$$\ce{FeCl3}$$

After doing a bit of research I found that $$\ce{KMnO4}$$ oxidises $$\ce{HCl}$$ to $$\ce{Cl2}$$. I doubt whether $$\ce{KMnO4}$$ would also oxidise chloride ions in case of acidified solution of $$\ce{FeCl3}$$.

I know that the ferric ion cannot be oxidised further.

• Are you sure that "[you] know iron cannot be oxidised further"? Ferrate (IV), Ferrate (V) and Ferrate (VI) oxidation states exist even though the (VI) is the most encountered among the three. $FeCl_3$ has iron (III).
– Kav
May 4 at 13:25
• Have you considered ferric chlorocomplexes ? May 4 at 13:27
• @Kav how likely is it that $\ce{Fe(III)}$ can be oxidized further ? Will it do under normal conditions with $\ce{KMnO4}$ or do you require drastic conditions ? May 4 at 13:31
• Iron can be oxidized further, but not by KMnO4. May 4 at 13:36
• @Kav Well, ferrates are stronger oxidants than permanganates, and other higher oxidation states of Fe don't exist in water. May 4 at 15:06