[bosongyin]

I am doing a practical exam to determine the concentration of a 20 volume solution of hydrogen peroxide by a titration method.

I have decided to use Potassium permanganate as the oxidising agent, so does it mean that would be my catalyst? and also do I have to Standardize Potassium permanganate b4 using it for titration?
Could anyone give me some indications of method?

thanks.

[DevaDevil]

first of all: there is no catalyst. The permanganate will react directly with the peroxide.
No indicator is needed either because of the coloring of the permanganate.

The questions you gotta ask yourself are:
1.) what is the reaction that will occur?
2.) In order to measure the concentration of the peroxide, what concentration of permanganate in the titrant is useful? (too low and you'll be pipetting a huge volume, too high and you'll be pipetting to few resulting in an error) This will of course also depend on the volume of the sample.

After that it is just preparation, doing the experiment and calculating.