The pH value of a chemical determines whether a chemical mixture is acidic, basic or neutral in nature.Any value greater than 7 makes the solution basic and less than 7 makes it acidic.Anything=7 is neutral.
Eg:pH of Blood is 7.4(so it is basic)
pH of Water is 7 ( so it is neutral)
The highest possible pH of a chemical is 14.
The pH scale ranges from 1 to 14.