Answer: copper (II) Sulphate
Explanation:
a.) The concentration in the eye dropper is copper (II) tetraoxo sulphate (vi)
Which is also called copper (II) sulphate
b.) Copper sulfate is a chemical compound with the formula CuSO4 and can be made in a chemistry laboratory by reacting copper oxide with sulphuric acid.
Apparatus used are :
Safety goggles, Bunsen burner, tripod. Test tube, beaker, conical flask, funnel and filter paper.
Procedures:
Check that the air hole on the Bunsen burner is fully closed, and turn on the gas tap. Light a splint and hold it two inches over the top of the Bunsen burner to ignite the gas.
Pour 20 cm3 of the dilute sulphuric acid into the beaker. Open the air hole on the Bunsen burner to give a blue flame, and place the beaker on the tripod. Heat the sulphuric acid until almost boiling.
Add a small amount of the copper oxide powder into the beaker using a spatula. Stir the mixture for 30 seconds with the glass stirring rod. Repeat until one gram of copper oxide powder has been added.
Continue to heat for another two minutes to ensure the reaction has completed. Turn off the Bunsen burner and allow the beaker to cool slightly.
Place a funnel in the conical flask, and fold a filter paper to fit the funnel. Swirl the beaker gently to ensure the contents of the solution are mixed, then pour the solution slowly through the filter paper. This step removes any unreacted copper oxide remaining. Clear blue copper sulfate solution will be left in the flask. If there are any impurities remaining in the solution, repeat the filter process.
