Question

how pH scale help us to understand the nature of compound​

Answer 1

The pH scale, which measures from 0 to 14, provides an indication of just how acidic or basic a substance is.Small changes in pH represent large changes in the concentrations of hydrogen ions. Pure water is neutral. It is neither acidic nor basic, and has a pH of 7.0. Anything below 7.0 (ranging from 0.0 to 6.9) is acidic, and anything above 7.0 (from 7.1 to 14.0) is alkaline.

Answer 2

We can use special equipment like red litmus or blue litmus paper to check the nature of a compound by diping it into the compound