Lab: Compounds and Mixtures
Safety
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I will not mix anything my teacher doesn’t tell me too.
I will not eat or drink during lab.
I am responsible for my actions and will not “play” with lab equipment>
Signature________________________
Date______________________
Directions
Part 1
Lab: Pure Substance or Mixture?
1.
What do you think a pure substance is and give 2 examples.
2. What is a mixture and give 2 examples.
Look at the items in the bucket and according to your definition decide if the substances
are pure substances or mixtures and explain your answer..
Sample
Pure Substance or Mixture
A
B
C
D
E
F
G
H
Explain
Analysis?
1. What properties of pure substances or mixtures help you decide what each sample was?
2. Which substances were hard to determine and why?
3. What tests could you perform to determine if the samples were composed of only 1 substance?
4.
Which substances dissolved in water?
Part 2
1. Write an if, then hypothesis. EX. If it is a crystal, it will form a suspension.
a. Possible variables
i. IV
1. Powder
2. Color
3. Crystal
ii. DV
1. Suspension
2. Solution
2. Put 10 ml of water into beaker 1-7.
3. Put ½ scoop of chemical 1 in test tube.
4. Put stopper in test tube and shake 100x
5. Let it set for more than 1 min.
6. Record data in Data Table
7. Repeat steps 2-6 until finished.
Substance
Formula
Sand
SiO2
Potassium
Permeanate
Zinc Oxide
Sugar
Sulfur
Copper
Sulfate
Salt
KMnO4
ZnO
C6H12O6
S
CuSO4
NaCl
Powder/Crystal
Uniform
color
Transparent
Settle
Solution/suspension