homework question.. exam thursday please help?

[homerun2727]

I need to calculate the concentration for the H2O2 and the KI solutions for each trial after they were mixed together...
How do i do this



So in my chemistry lab we basicallly ran a series of experiments where we mixed a certain amount of KI and H2O2 together and calculated the pressure at a specific temperature over time.. I have completed most of the questions but I am stuck on one:
I need to calculate the concentration for the H2O2 and the KI solutions for each trial after they were mixed together...
How do i do this

Trial 1
4mL 3% H2O2 + 1 mL of .5M KI
Trial 2
4mL 3% H2O2 + 1mL of .25M KI
Trial 3
4mL 1.5% H2O2 + 1mL .5M KI

Trial 4 and trial 1 were the same but different temperature
Temp for trials 1,2,3 = 23.8 C
Temp for trial 4 = 35.7 C

I calculated the Concentration for H2O2 to be .8820 M

Anything you can tell me would be greatly appreciated.. if possible could you show me how to work out for one of the trials so i can do the final 3