ProLesson 3 of 37 min read

The difference between an acid and a base

Understand what makes a substance an acid or a base, how the pH scale works, and what happens when they neutralise each other.

Acids and bases are everywhere: in your stomach, in lemon juice, in soap, in soil and in swimming pools. Knowing the difference helps you predict how substances will react and handle them safely. It also connects to the last two lessons, because acid–base reactions are rearrangements of atoms that you can write as balanced equations.

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