Required Practical 1:Making Soluble Salts

• What is the main topic of the video?

  Making a soluble salt using an acid
• Why is making a soluble salt a required practical?

  It is likely to appear on exams
• 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 a fixed amount of dilute sulfuric acid
• Why is dilute sulfuric acid considered the limiting reactant?

  It will run out first in the reaction
• What should be avoided when heating the acid?

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

  The solution turns blue
• When should you stop adding copper oxide?

  When the solution is clear blue
• 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 purpose of evaporation in this process?

  To concentrate the solution and form crystals
• How long should the solution be left to form crystals?

  24 hours
• What should be done after the crystals form?

  Scrape them on a paper towel
• What is the final product of this process?

  Pure dry crystals of copper sulfate
• Where can students find more questions on this practical?

  In the vision workbook
• 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 on a paper towel.
• What are the differences between using a metal oxide and a metal carbonate in making salts?

  • Both can react with acids to form salts.
  • Metal oxides produce water and salt.
  • Metal carbonates produce carbon dioxide, water, and salt.