Acids, alkalis and salts

• Neutralisation

  • A base is a substance that neutralises an acid
  • Eg copper oxide and sodium hydroxide are examples of bases
  • A neutralisation reaction is a reaction between an acid and base
• Base

  • A substance that reacts with an acid to neutralise it and produce a salt
• Alkali

  • A base which is soluble in water
• Making salts from insoluble substances

  1. Add the solid to the acid until the reaction stops
  2. Filter
  3. Heat the filtrate until the solution is saturated
  4. Leave in a dry place for the rest of the water to evaporate