If you have too much hydrochloric acid in your stomach
Food leaves acids in mouth
Repair kits contain sulphuric acid
Contains magnesium hydroxide
Lime is Calcium Oxide
Acids cause decay
Neutralised by adding Lime
Oxygen reacts with metal
Metal Oxide is a base
Burning makes Acidic Gases
Rust is when a metal breaks down
Can cause farting or burping
Aluminium Hydroxide
Contain Carbon and Sulphur
Toothpaste contains a base
Usually powder or tablet
