pH Calculations Tutorial
- pH is a measure of the hydrogen ion, or proton (H+), concentration in a solution.
- pH is always written with a lower case "p" and an upper case, or capital, "H"
(The chemical symbol for hydrogen is H and pH is a measure of hydrogen ion concentration.)
- pH is defined as the negative logarithm (to base 10) of the hydrogen ion concentration in mol L-1
- pH of a solution is calculated using the formula (equation):
pH = -log10[H+]
[H+] is the concentration of hydrogen ions in mol L-1 (mol/L or M)
- As the concentration of hydrogen ions increases, the pH of the solution decreases.
As the concentration of hydrogen ions decreases, the pH of the solution increases.