Contains magnesium hydroxide

Usually powder or tablet

Can cause farting or burping

If you have too much hydrochloric acid in your stomach

Burning makes Acidic Gases

Lime is Calcium Oxide

Contain Carbon and Sulphur

Neutralised by adding Lime

Food leaves acids in mouth

Acids cause decay

Toothpaste contains a base

Aluminium Hydroxide

Rust is when a metal breaks down

Oxygen reacts with metal

Metal Oxide is a base

Repair kits contain sulphuric acid