Required practical 1: Making soluble salts

Required practical 1: Making soluble salts

1. apparatus

   • beaker
   • stirring rod
   • filter paper
   • filter funnel
   • water bath (beaker of water on a tripod and gauze, heated over a Bunsen burner)
   • evaporating basin
   • watch glass
   • heatproof mat
   • gauze
   • spatula

2. method

   • 1. add powdered insoluble reactant to acid in the beaker, one spatula at a time, starting to mix
   • 2. continue adding powder until its in excess
   • 3. filter the mixture in the beaker to remove the excess powder and collect the filtrate.
   • 4. pour the filtrate into the evaporating basin. place on a water bath and evaporate about half of the solution
   • 5. pour the remaining solution in a watch glass, leave in a warm, dry place for crystillation
   • 6. dry the crystals by dabbing gently with filter paper

3. safety

   • use dilute hydrochloric acid
   • do not touch hot apparatus
   • tie back long hair and tuck in ties or other loose clothing
   • eye protection must be worn throughout