Question

what do you mean by pH.​

Answer 1

A measure of acidity or alkalinity of water soluble substances (pH stands for 'potential of Hydrogen'). A pH value is a number from 1 to 14, with 7 as the middle (neutral) point. Values below 7 indicate acidity which increases as the number decreases, 1 being the most acidic.

Answer 2

pH of the solution is the negative algorithm(to the base 10) of the hydrogen ion concentration expressed in moles/litres