2.1.4 (Acids)

• Hydrochloric acid:

  HCl
• Sulphuric acid:

  H2SO4
• Nitric acid:

  HNO3
• Acetic acid (Ethanoic acid):


  CH3COOH
• Sodium hydroxide (alkali):


  NaOH
• Potassium hydroxide (alkali):


  KOH
• Ammonia (alkali):


  NH3
• What is an acid?

  A substance that releases hydrogen ions (H+) in an aqueous solution.
• What is an alkali?

  A base that dissolves in water.

  A substance that releases hydroxide ions (OH-) in an aqueous solution.
• A strong acid is one that is completely dissociated or ionised in an aqueous solution.
• A weak acid is one that is partially dissociated or ionised in an aqueous solution.