Homework Help: Chemistry

Posted by Brenan on Sunday, March 30, 2008 at 7:09pm.

A solution of hydrogen peroxide, H2O2 , is titrated with potassium permanganate, KMnO4 , according to the following equation:

5 H2O2 + 2 KMnO4+ 3H2SO4 -> 5O2 + 2 MnSO4 +8H2O + K2SO4

It requires 46.9mL of 0.145 mol/L KMnO4 to titrate 50.0 mL of the solution of H2O2 .

What is the moles per litre concentration of H2O2 in the solution?

Chemistry - DrBob222, Sunday, March 30, 2008 at 7:28pm
Determine mols KMnO4.
mols KMnO4 = M x L = ??

Convert mols KMnO4 to mols H2O2 using the coefficients in the equation.
mols H2O2 = mols KMnO4 x (5 mol H2O2/2 mol KMnO4) = ??

Convert mols H2O2 to mols/L.
M = mols/L
Check my work.
Post your work if you get stuck.
- Chemistry - DrBob222, Sunday, March 30, 2008 at 8:23pm
  Go the top of the board, click on Post a New Question, and post your question. Please also indicate how you think the problem might be approached.
Chemistry - Anonymous, Thursday, October 25, 2012 at 10:45pm
.34 M

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