How do we work out [H_3O^+] from pH?

1 Answer
Jan 17, 2017

Clearly, you are working out the hydronium ion concentration in a solution, where.......

Explanation:

[H_3O^+]=10^(-pH).

Back in the day, we had to use logarithmic tables, and take the antilogarithm. These days, given a calculator, put in the pH value, hit the "+/-" button to make this value negative, and then hit the button 10^x, to give 10^(-pH).

Most calculators have the log button on a shift with 10^x. Anyway, if I have not answered your question, someone will try again.