Calculate the pH of a solution that is 0.50M HOCl and o.75 M NaOCl.?

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Can someone do this out for me? It is a practice prob I need to be able to understand to do my homework. Thanks. -The idiot

2007-05-23 10:50:25 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

This is a buffer

pH = pK + log [ClO- ] / [ HClO ]

Ka = 3.2 x 10^-8

pKa = 7.49

pH = 7.49 + log 0.75 / 0.50 = 7.67

2007-05-23 22:28:55 · answer #1 · answered by Anonymous · 0⤊ 0⤋

You need the Ka of HClO, and then:

[H+] = Ka x 0.5/0.75.

Then take the negative log of [H+].

2007-05-23 18:02:17 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋