Making Salts

• Find two solutions with the required ions
  • They must be aqueous, so make sure that both substances are soluble
• Perform a precipitation reaction
• Filter the precipitate from the solution, wash it, and then dry it on filter paper

This method is used with a metal or insoluble base

• Pick a suitable acid, plus a suitable metal, metal oxide, or metal hydroxide
  
  • e.g. hydrochloric acid and copper oxide to make copper chloride
• React the two - you can tell when the reaction is finished as the solid will stop reating
• Filter out excess solid to get the salt solution
• Evaporate some of the water and then leave the rest to evaporate slowly - this is called crystallisation

This method is used with soluble bases

• Perform a titration to add exactly the right amount of alkali to neutralise the acid
• Evaporate the water and leave to crystallise