Question

An unknown substance has the hydrogen ion concentration of [H+] = 3.2 10-8 M. Find the pH. (Round your answer to one decimal place.)

Answer 1

The pH is defined as the negative logarithm (base 10) of the hydrogen ion concentration:

pH = -log[H+]

Substituting the given value for [H+], we get:

pH = -log(3.2 x 10^-8)

Using a calculator, we can evaluate the logarithm to be:

pH = 7.5

Rounding this answer to one decimal place, we get the final result:

pH ≈ 7.5