why do  pottassium permangnate act violently in water?

Asked by darsanasanjeev | 7th Nov, 2014, 11:34: PM

Expert Answer:

Dear darsanasanjeev@gmail.com

Thanks for asking us a question in Ask the Expert section of TopperLearning.com.

The scope of this helpdesk is to answer subject related queries which are relevant to understanding concepts and solving problems.
 
Solution for your query,
 
Potassium permanganate is soluble in water but does not react violently with water. It reacts violently with glycerin.
 
Potassium permanganate is a strong oxidising agent when dissolved in water.

KMnO4 + H2O → MnO2 + K+ + OH- + O*
 
Potassium permanganate is a much stronger oxidizing agent than molecular oxygen (4 oxygen atoms vs. 2). By adding this to a substance which has a lot of carbon-hydrogen bonds, a similar effect to burning a match will occur.
KMnO4 + Glycerin (high concentration of C-H bonds) --> Fire + Ash + CO2 + H2O
 
Regards

Topperlearning Team.

Answered by Prachi Sawant | 10th Nov, 2014, 10:21: AM