Soluble or Insoluble
Apparatus
• Boiling/Test Tubes x6
• Copper Sulphate
• Copper Carbonate
• Instant Coffee
• Sugar
• Salt
• Flour
• Water
• Spatula
• Test Tube Rack
Method
1. Fill each test tube halfway with water.
2. Add the copper sulphate, copper carbonate, coffee, sugar, salt and
flour to each tube and mix thoroughly.
3. Observe changes and solubility
Result
Substance mixed with
Clear or Cloudy?
Solution?
water
Salt
Clear
Yes
Sugar
Clear
Yes
Flour
Cloudy
No
Coffee
Cloudy
No
Copper Sulphate
Clear
No
Copper Carbonate
Cloudy
No
1. Which of the substances dissolved in water?
The salt and sugar dissolved in water.
2. How can you tell if a substance has dissolved?
You justify its clarity and how clear the water is, in addition to the
fact that if there is a solid in the bottom or floating on the top
then you can determine that it is not dissolved. To be dissolved the
solute has to be hidden from sight.