What is the h+ concentration when ph is 2, 6, 7, 8, and 12?

See below.

Explanation:

pH = - log (H+)

So the pH of 1 x 10^-7 M solution is 7.

I'm sorry but I'm not sure about what the other units mean, so Im not sure of the answer to those.

If you convert the other units to the form  1 x 10^-n  then the pH will be n.

What is the H+Concentration when oh is2,6

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