Question

PLEASE HELP
What is the pH of a weak acid solution that has an [H+] of 2.1 × 10^–6 M

Answer 1

pH ( potential Hydrogen ) is a negative logarithm of molar concentration of hydrogen ions.

`pH = - log[H {}^( + ) ]`

therefore:

`pH = - log(2.1 * {10}^( - 6) ) \\ { \boxed{pH = 5.68}}`