O.k. I mixed 30 mL of 1.0 M hydrogen peroxide (H2O2) with 120 mL distilled water. I then took 20 mL of this solution and mixed it with 40 mL buffered KI, 10 mL sodium thiosulfate and another 10mL of distilled water. So, now there's 80 mL of this new solution. How would I calculate the moles/Liter of H2O2?
M1V1 = M2V2
(1.0 mol/L)(0.03 L) = M2(0.150 L)
M2 = 0.20 mol/L
Then, M1V1 = M2V2
(0.20 mol/L)(0.020 L) = M2(0.080 L)
=0.05 mol/L?
Hmm, there's got to be a better way.