The negative logarithm of hydrogen ion concentration in a solution is calledpH of that solution.
Let us assume that concentration of hydrogen ion in a solution is 1 x 10- 4 gm mole L-1 .
The pH of this solution can be calculated as follows:
pH = -log [1 x 10-4 ]
pH = 41og1010
pH = 4
pH range is between 0 to 14. The pH of a neutral solution is 7.
All basic solutions have pH more than 7.
All acidic solutions have pH less than 7.
