making soluble salts rp

• What is an example of a soluble salt mentioned?

  Copper sulfate
• What positive ion is found in copper sulfate?

  The metal ion cu$^{2+}$
• From where can the metal ion in salts come?

  From metal, oxide, hydroxide, or carbonate
• Why can't copper sulfate be made by reacting copper with dilute sulfuric acid?

  Copper is not reactive enough
• What are the four sources of metal ions mentioned?

  Metal, metal oxide, metal hydroxide, metal carbonate
• What negative ion is found in copper sulfate?

  The sulfate ion $SO_4^{2-}$
• What acid is used to make copper sulfate?

  Sulfuric acid
• What is the first step in making pure crystals of a soluble salt?

  Start with dilute sulfuric acid
• Why is dilute sulfuric acid considered the limiting reactant?

  It will run out before other reactants
• What should be avoided when heating the acid?

  Allowing it to boil
• What happens when copper oxide is added to the acid?

  It reacts and disappears, turning blue - till it is in excess
• When should you stop adding copper oxide?


  When the solution is clear blue - fill it is in excess
• What is done with unreacted copper oxide?

  It is filtered away
• What equipment is used to filter the unreacted copper oxide?

  Filter funnel and filter paper
• What is the next step after filtering the solution?

  Evaporate the solution to form crystals
• How is the copper sulfate solution heated for crystallization?

  Put solution in an evaporating dish and fill a beaker with water heat the beaker so it gently steams the copper sulfate
• How long should the solution be left to form crystals?

  24 hours
• What is done to the copper sulfate crystals after they form?

  They are scraped and gently patted dry
• What do you end up with after the process?

  Pure dry crystals of copper sulfate
• What are the steps to make a soluble salt using an acid?

  1. Start with dilute sulfuric acid.
  2. Add copper oxide and stir.
  3. Filter out unreacted copper oxide.
  4. Evaporate the solution to form crystals.
  5. Dry the crystals.
• What are the properties of copper sulfate?

  • Soluble salt
  • Contains cu$^{2+}$ and $SO_4^{2-}$
  • Forms blue crystals
• What are the differences between using a metal oxide and a metal carbonate in this process?

  • Both can produce soluble salts
  • Metal oxides react with acids to form salts
  • Metal carbonates produce carbon dioxide during reaction