Acids, Bases and salts

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  • Created by: Amy
  • Created on: 08-05-13 19:47

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.


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