November 27, 2015

Homework Help: Chemistry

Posted by Katherine on Friday, April 20, 2012 at 1:35am.

A solution household bleach contains 5.25% NaClO, by mass. Assuming that the density of bleach is the same as water(1.0g/ml). Calculate the volume in mL of household bleach that should be diluted with water to make 500.0 ml of a pH= 9.80 solution.

Here's what I've done so far..
Kw = Ka * Kb
1.0 x 10^-14 = 4.0 x 10^-8 * Kb
Kb = 2.5 x 10^-7

5.25% = 52.5 g NaClO/74.44 g.mol = 0.705 mol NaClO

where would i go from here?

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