Decomposition of hydrogen peroxide

[Clari]

For the decomposition of hydrogen peroxide in the presence of manganese(IV) oxide, what is the chemical method to determine the concentration of hydrogen peroxide, at different times?

The solution is: To add the reaction mixture in dilute sulphuric acid, and then titrate the reaction mixture with potassium permanganate.

please tell me why dilute sulphric acid is used. Thanks!

 

[Clari]

This is an old thread, but I am still waiting for someone to help me with it. ^-^

 

[GCT]

I thought we already answered this question...several times. Perhaps it is to prevent the hydrolysis reaction of the metal with water, an acid base reaction between the metal and water. If you add a stronger acid than the metal, the former will react with the water instead of the metal.