Question

what is pH scale? what will happen to the pH of a solution if some HCL is added to it?

Answer 1

A measure of acidity or alkalinity of water soluble substances (pH stands for 'potential of Hydrogen'). It will indicate the pH to be less than 7

Answer 2

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.