OML Search

Preparing Copper(II) Sulphate


Related Topics:
More Lessons for IGCSE Chemistry
More Science Lessons (KS3/Checkpoint 1)
More Science Lessons (KS3/Checkpoint 2)



 
A series of free IGCSE Chemistry Activities and Experiments (Cambridge IGCSE Chemistry).

Preparing Copper(II) Sulphate
How to make copper sulphate (soluble salt) from an insoluble base (copper oxide) and sulphuric acid?

Method
1. Pour 25 cm3 of sulfuric acid into a beaker.
2. Add in excess copper(II) oxide.
3. Heat the beaker and stir until reaction is complete.
4. Filter off the unreacted solid, collecting the clear blue solution in an evaporating dish.
5. Boil the solution for 2–3 minutes.
6. Let the solution cool and watch the crystals grow.



Questions
1. Why does heat speed up the reaction?
2. Write word and balanced chemical equations for the reaction taking place.
3. What does the fact that there is some unreacted solid left after the reaction tell you about the proportions of reactants used? Why is it important that the reaction is carried out with these proportions?

Answers
  • Show Solutions
    1. Heat makes the particles move faster and have more energy. They will collide more often and with more energy.
    2. copper(II) oxide + sulfuric acid → copper(II) sulphate + water
    CuO(s) + H2SO4(aq) → CuSO4(aq) + H2(l)
    3. It indicates that the copper oxide was present in excess. This makes sure that all the acid is reacted. This is important because we will be heating the solution after filtration and hot, concentrated acid would be dangerous.

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


OML Search


We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.


[?] Subscribe To This Site

XML RSS
follow us in feedly
Add to My Yahoo!
Add to My MSN
Subscribe with Bloglines