Find the pH of 8.4x10^-8 M HCl. Report the answer to the hundredths place.

7.08

Explanation:

First, we need to write a balanced dissociation equation equation for HCl. This is illustrated below:

HCl <==> H+ + Cl-

Now, we see clearly that 1mole of HCl produced 1mole of H+. This means that 8.4x10^-8M HCl will also produce 8.4x10^-8 M H+

Now, we can obtain the pH as follows:

[H+] = 8.4x10^-8 M

pH = —Log [H+]

pH = —Log 8.4x10^-8

pH = 7.08

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