An acid reacts with a base and a salt is formed. Which ions make up that salt?

1. The reaction between an acid and a base is a neutralisation reaction. 2. To a chemist a salt is any product of an acid-base reaction, not only table salt. 3. The salt is made up of the cation from the base and the anion from the acid. 4. Sodium hydroxide supplies the sodium and hydrochloric acid supplies the chloride when the two react. 5. Where the base contains hydroxide ions, water is produced alongside the salt. 6. Swapping the two sources gives an ion pair that could never have come from that reaction, which is the trap here. _Source: Siyavula Physical Sciences Grade 11 (Everything Science, CC BY 4.0), Chapter 13: Types of reactions_