Activity 3: Mixing It Up
1. The mixtures will be made in the following way:
A 20mL of water and 1mL of sugar
B 20mL of water and 1mL of soil
C 20mL of water and 1mL of orange juice crystals
D 20mL of water and 1mL of flour
E 20mL of water and 1mL of salt
F 10mL of water and 10mL of milk
G 10mL of water and 10mL of rubbing alcohol
H 10mL of water, 1drop of iodine and 10mL of oil
I 20mL of milk
J 20mL of rubbing alcohol and 1mL of soil
2. Combine the mixtures in different test tubes, place a stopper in the test tube and shake. Allow the test tubes to sit for 5 minutes before making your observations (and for each of the test tubes make the following observations).
3. Observe and record if the mixture is homogenous or heterogenous.
4. Observe and record whether or not the particles settle.
5. Observe and record the colour of the mixture.
6. Observe and record if the mixture is transparent.
7. Use the flashlight to shine a light source through the test tube.
Does the light source pass through the mixture (note: if the light source gets scattered and doesn’t pass through then the mixture is not a solution.
8. Answer the questions on the following page.
9. Complete the lab write up in good copy (for the procedures you may include this handout and write next to the procedures section in your write up - SEE HANDOUT.
Similarly the conclusions will be the answers to the following questions: therefore if you answer them on the sheet then hand in the activity sheet with your write up.
Questions for: Mixing It Up
1. For your mixtures that were solutions fill in the following chart: (What was the solvent and solute; and what are the states of matter of each):
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Solute |
Solvent |
State of solute |
State of solvent |
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2. From what you observed, compare the characteristics of solutions and mechanical mixtures.
3. Why did some substances dissolve, and others didn’t?
4. List 5 solutions and 5 mechanical mixtures that are found around your home and/or used in industry.