Year 7 Mixtures: Testing soluble and insoluble substances
Name: _______________________________
Partners: ______________________________________________
Date: _______________
Aim:
Materials:
 ½ spatula copper carbonate (CuCO3)
 ½ spatula copper sulfate (CuSO4)
 1 spatula table salt (NaCl)
 cooking oil in dropping bottles
 6 mL kerosene
 6 medium test tubes with stoppers to fit
 test tube rack
 marking pen
 spatula
Method:
 Place test tubes in the rack. Use the marking pen to label them 1 to 6
 Add about 5cm of tap water to test tubes 1 to 4. Pour 3cm of kerosene into test tubes 5
and 6.
 Add different solutes to the different test tubes:
Test tube 1: ½ spatula copper carbonate (CuCO3)
Test tube 2: ½ spatula copper sulfate (CuSO4)
Test tube 3: ½ spatula of table salt (NaCl)
Test tube 4: 0.5 com of cooking oil
Test tube 5: 0.5cm oil
Test tube 6: ½ spatula of table salt (NaCl)


Place a stopper on each test tube. Shake each test tube for about 1 minute. Place all test
tubes in the rack and record your observations
Dispose of all materials and equipment appropriately
Results:
Test Solvent
tube
No.
Substance
tested
Observations:
Discussion:
1. How did you tell if a solution formed? What signs did you look for?
2. In which test tubes did a solution form?
3. What do you call a substance that dissolves in a solvent?
4. Name the substances that we insoluble in:
a) Water:
b) Kerosene:
Soluble or
insoluble?
Solution,
colloid or
suspension?
5. Identify the substance that is:
a) A solvent of salt but not of oil:
b) A solvent of copper sulfate but not of copper carbonate:
Conclusion:
Assessment criteria
Mixtures
Comments
Score
Prac: Testing soluble and
insoluble substances
Submitted on time
/1
Title, Name, Partners, Date
/1
Aim
/1
Results/Observations
/6
Discussion Questions
/7
Conclusion
/2
Total
/17
Solute = the substance being dissolved
Solvent = the substance doing the dissolving
Solution = the combined mixture of the solvent and solute (the particles are uniformly mixed)