Name: ________________________
Date: ________________
Period:____
WS Types of Matter
1. Classify the following as pure substances (s) or mixtures (m).
a) tap water _______
d) vegetable oil _______
b) nitrogen gas ________
e) table sugar _______
c) peanut butter_______
f) orange juice _______
2. Identify the following mixtures as either a homogeneous (solution) or heterogeneous.
a) table salt dissolved in water ____________________________________
b) carbon mixed with sand ______________________________________
c) brass (alloy of copper and zinc) _________________________________
d) fresh squeezed lemonade with pulp _______________________________
e) vegetable soup ________________________________
3. Read each of the following descriptions, then determine if the substance described in each case is
Element , Compound , Homogeneous Mixture , Heterogeneous Mixture. Explain your choice.
Pure
Substance
Solution
a) A cloudy white liquid is left to stand for several hours. At the end of this time, the top of the
liquid is clear and there is a clump of white solid at the bottom of the liquid.
_______________________ because ________________________________________________
_______________________________________________________________________________
b) A clear, colorless liquid is heated. Some of it boils away (evaporates) at 25 oC, then the rest boils
away at 100 oC.
_______________________ because ________________________________________________
_______________________________________________________________________________
c) When heated strongly, a pure green solid decomposes into a white solid and a colorless gas.
_______________________ because ________________________________________________
_______________________________________________________________________________
d) A pure yellow solid appears cannot be broken down into other substances chemically.
_______________________ because ________________________________________________
_______________________________________________________________________________
4. Complete the following table by putting ONLY 1 check mark for each sample of matter.
Hint: If a chemical formula is given, it’s a pure substance so choose element or compound.
If no formula is given, it’s a mixture so choose solution (homogeneous) or heterogeneous.
Matter
Chemical
formula
(if available)
Aluminum foil
Carbon
monoxide
Air
Chalk
Chocolate chip
cookie
Orange juice
(no pulp)
Charcoal
Al
CO
CaCO3
C
Chlorine gas
Cl2
Copper
Cu
Diamond
C
Salad dressing
Iron
Fe
Rock
(like granite)
Lead
Pb
Salt water
Chocolate
Distilled water
H2 O
Flat soda
Sodium
Vinegar
Na
Pure substance
Element
Compound
Mixture
Solution
(homogeneous
mixture)
Heterogeneous
mixture