Paper 1 Chemistry Practicals

• What does the preparation of a soluble salt involve?

  The preparation of a pure, dry sample of soluble salt from an insoluble oxide or carbonate
• What equipment is used in the second soluble salt practical apparatus?

  -Evaporating basin, containing solution

  -A beaker, containing boiling water

  -Tripod

  -Bunsen Burner
• What is the equipment used in the first part of the soluble salt practical?

  -Beaker, containing the solid and solution

  -Filter Paper

  -Filter Funnel
• What reagents should be used in the soluble salt practical?

  -Acid: Hydrochloric, sulfuric or nitric

  -Solid: must include the correct metal ions, react with the acid and insoluble in water
• What are the hazards, risks and precautions of the soluble salt practical?

  -Hydrochloric acid--> can be corrosive and damaging if concentrated, use dilute acid

  -Bunsen Burner & Hot Apparatus---> Burns/hair and clothing catching on fire, do not touch apparatus/tie back hair and loose clothing
• What happens at the first part of the soluble salt practical (apparatus 1)

  -Add powdered insoluble reactant to acid in a beaker, one spatula at a time, stirring to mix. Continue adding powder until it is in excess.

  -Filter the mixture in the beaker to remove the excess powder. Collect the filtrate.
• What happens at the second part of the soluble salt practical (second apparatus)?

  -Pour the filtrate into an evaporating basin. Place on a water bath, and heat until about half the water from the solution has been removed by evaporation. Stop heating when small crystals start to appear around the edge of the evaporating basin.

  
  

  -Pour the remaining solution into a watch glass, and leave in a warm, dry place for crystallisation to occur. dry the crystals by dabbing gently with filter paper.