Acids

1. Chemical reactions

1.1. Reactions with bases

1.1.1. produces salt and water

1.1.1.1. neutralisation reaction

1.2. Reaction with metal carbonates

1.2.1. produces salt, carbon dioxide and water

1.3. Reaction with metal

1.3.1. produces salt and hydrogen

2. Physical properties

2.1. turns blue litmus paper red

2.2. have sour taste

2.3. turns universal indicator green to red