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Chemistry – Unit 4 Worksheet 1
1. Identify the separation techniques pictured below. Which technique would be
useful to separate a mixture of sand and salt? Of salt and water?
distillation
Dissolve in water and
filter out insoluble
component.
2. Explain why the technique at left would not be effective in separating a mixture of
salt and sugar.
Both sugar and salt are soluble in water. Both would be in the solution that passes through the
filter paper.
3. Draw particle representations for the following:
A mixture of iron and sulfur
A compound of iron and sulfur
Any ratio, particles not bound
fixed ratio (not necessarily 1:1), particles, bound
4. Explain why a magnet can separate iron atoms from the mixture but not from the
compound.
Iron atoms still retain their magnetic property in the mixture, but not when compounded with
sulfur atoms.
Modeling Chemistry
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5. Consider the four containers below.
a. Which of these are mixtures? B & D
pure substances?
b. Which contain only compounds? A & D
A&C
only elements
C
6. Consider the four containers below.
a. Which of these are mixtures?
B & C pure substances? A & D
b. Which contain only compounds? A & C only elements
D
7. Consider the four containers below.
a. Which of these are mixtures?
none pure substances?
all
b. Which contain only compounds? B & C only elements A & D
8. Which of the containers in #7 contain a gas? A & C a liquid B a solid D
Modeling Chemistry
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