What is the pH of a HCl solution with a concentration of 1.0x10^-8?

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What is the pH of a HCl solution with a concentration of 1.0x10^-8?

2007-01-09 10:26:34 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

3 answers

The pH is the negative value of the log of the concentration of [H+] ions. In normal water (H2O), dissociated in H+ and OH-, the value of [H+] is 10^-7, therefore the pH is 7.

HCl is a strong acid, therefore completely dissociated.
A solution of HCl concentration 10^-8 in water, will contain:

[10^-7] + [10^-8] = 1.1*10^-7 ions of [H+]

Therefore the pH is around 6.96

2007-01-09 23:51:10 · answer #1 · answered by Jesus is my Savior 7 · 0⤊ 0⤋

2007-01-09 10:37:16 · answer #2 · answered by pop c 2 · 0⤊ 3⤋

A favourite trick question. It's just under 7. The H+ ions from the water have to be added to the H+ ions from the HCl.

2007-01-09 10:46:48 · answer #3 · answered by Gervald F 7 · 2⤊ 0⤋