Acid had Hydrogen in it.
The strength of acid is measured on the pH scale.
It goes from 0 to 14.
0-1 is Red
2-3 is Orange
4-6 Yellow
7 Green
8-10 Blue
11-12 Indigo
13-14 Violet
A base is the opposite chemical to an acid.
A base contains hydroxide (OH)
An acid and a base NEUTRALISE each other and make water.
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