The pH scale.
pH scale.
A number scale from 0 to 14 that tells us if something is an acid neutral or alkali.
0 to 6 = acid.
7 = neutral.
8 to 14 = alkali.
How it works.
It works by measuring ions in a liquid.
What is ions.
particles that decide how a substance behaves.
How to measure pH.
Find pH using litmus paper, universal indicator paper or a pH meter that shows the exact number.
Fun Fact
Rainwater is naturally slightly acidic with a pH around 5.6 because it absorbs carbon dioxide from the air.
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