An aqueous solution has a hydronium ion concentration of 6109 mole per liter at 25°C. What is its pH?

2 Answers
May 9, 2016

pH=8

Explanation:

The pH of a solution could be calculated using the concentration of hydronium H3O+ by: pH=log[H3O+]

Therefore, pH=log(6×109)=8.22=8(1 significant figures)

Acids & Bases | Nature, Strength & pH Scale.

May 9, 2016

pH=8.22

Explanation:

So what is pH?

Here it is simply the function pH=log10[H3O+], pH derives from the French pouvoir hydrogene, the power of hydrogen.

We have [H3O+] and we have a calculator, so we press the buttons.

It is worthwhile to review the logarithmic function, and see why the use of logarithms (and slide rules) was absolutely widespread among scientists and engineers in a pre-calculator world.