how does the conc of a hydrogen peroxide soln affect the speed at which it decomposes to produce o2?

Answer 1

im not doing you homework for you...maybe you look it up in that chemistry book your teacher gave you

Answer 2

It sounds like you are asking about Le Chatlier's principle, which can be found in detail at this link:

http://en.wikipedia.org/wiki/Le_chatlier

However, since H2O2 is just merely decomposing to H2 and O2 it is a zero order reaction and is thus independent of concentration, that is to say it decomposes at a constant rate at any concentration.