Making Soluble salts

• equipment used for making the soluble salt

  • beaker
  • spatula
  • glass rod
  • evaporating basin
  • bunsen burner
  • filter paper
• Making soluble salts by using an acid


  1. Start with a fixed volume of dilute sulfuric acid

  2. Gently heat the acid until almost boiling

  3. Use a spatula to add small amounts of copper oxide to the acid

  4. Stir the solution with a glass rod

  5. Continue adding copper oxide if the solution continues to be clear blue

  6. Stop adding copper oxide if some powder remains after stirring

  7. Use filtration to remove the unreacted copper oxide using filter paper and a conical flask

  8. Place the copper sulfate solution in an evaporating basin

  9. Heat gently over beaker of boiling water until half the solution remains

  10. Leave the solution for 24 hours in a cool place for crystals to form

  11. Scrape copper sulfate crystals onto paper towel and gently pat them dry
• Limiting reactant


  The acid will run out
• Copper oxide reacting


  • It will seem to disappear
  • The solution will turn a blue colour as this is the colour of copper sulfate
• At this point the reaction has stopped as all the acid has reacted
• We have now made copper sulphate and the solution is neutral
• objective


  to prepare a pure, dry sample of a soluble salt from an insoluble oxide or carbonate using a bunsen burner and a dilute acid
• hypothesis


  a slat can be prepared and separated by using an acid-base neutralisation reaction
• materials

  • 1.0mol/dm^3 dilute sulfuric acid
  • copper oxide
  • spatula and glass rod
  • measuring cylinder
  • 100cm^3 beaker
  • bunsen burner
  • tripod
  • gauze
  • heatproof mat
  • filter funner and paper
  • conical flask
  • evaporating basin
  • dish
• practical tip


  the base is added in excess to use up all of the acid
• conclusion

  • acid-base reactions produce salt and water with the regular shape of the salt reflecting the ionic lattice structure in its bonding