October 6, 2015

Homework Help: AP Chem

Posted by Anna on Monday, November 3, 2008 at 11:36pm.

A solution of hydrogen peroxide, H2O2, is titrated with a solution of potassium permanganate, KMnO4.

It requires 51.7 mL of 0.145 M KMnO4 to titrate 20.0 g of the solution of hydrogen peroxide. What is the mass percentage of H2O2 in the solution?

If you want the whole equation I'll type it but it's long. I think all you need is the mole ratio which is 5 mol H202 : 2 mol KMnO4.

so far I changed 51.7 mL to L. Got .00750 mol KMnO4 using molarity and volume. converted that to .0188 mol H2O2.

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