Acids have a pH of less than 7. Bases have a pH of more than 7. When bases are dissolved in water, they are known as alkalis. Salts are made when an acid reacts with a base, carbonate or metal. The name of the salt formed depends on the metal in the base and the acid used.
indicatior - dye that changes colour, useful for estimating the pH of a solution.
Neutralision - Neatralisation is the reaction between an acid and a base to form a salt plus water.
Acids form H+ ions in water
Alkalis form OH- ions in water
acid + base = salt + water
H+ + OH- = H2O
(s) - solid (l) - Liquid (g) - gas (aq) - Dissolved in water/ aqueous
For example, hydrochloric acid and sodium hydroxide solution react together to form water and sodium chloride solution.…