# 3.2: Practice Classifying Matter

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Exercise $$\PageIndex{1}$$

Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture.

a)  liquid hand soap (transparent, not creamy)

b)  carbonated water (fizzing, not flat)

c)  ascorbic acid (also known as vitamin C, C6H8O6)

homogeneous mixture (has water, various soap molecules, possibly antimicrobial agents)

heterogenous mixture (CO2 gas bubbles are distinct phase, not uniformly mixed)

compound (has chemical formula)

Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture.

d)  isopropanol (C3H8O)

e)  a bottle of 70% isopropanol

f)  sulfur

compound

homogeneous mixture (has 70% isopropanol, 30% water)

element

Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture.

g)  bronze (metal alloy of copper and tin)

h)  silver

i)  oxygen gas (O2)

homogeneous mixture