Question

A student titrates three samples of .3% h202 solution made from a bottle of 3% h202 solutiondated 10/31/2007. Would you expect the calculated molarities of the samples to be higher or lower than the value you calculated for your experimental samples? justify your answer.

Answer 1

h202 decomposes at room temperature, as time goes by there are fewer moles of H2O2
so of course calculated molarities would be lower.