Could you explain the ph value please ??

Question

I mean how was the concept of ph value obtained??

Answer 1

It is the log, to the base ten,  of the concentration of hydrogen ions in a solution.

Answer 2

Ph value is the "power of hydrogen"

the scale is from 1 - 14

where pH 7 is the neutral (either acid or base)

lower than 7 means that the liquid is acidic

while higher than 7 means that the liquid is basic

in testing the pH, a litmus paper is used

Answer 3

It relates to the concentration of hydrogen ions in the solution. It can also be used in an equation  known as the Henderson-Hasselbach equation to find the equilibrium constant of the reaction.