Solutions Self-Assessment and Practice

Explain why solutions are classified as mixtures instead of compounds.

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In compounds, the components are chemically combined while in mixtures the components are only physically combined. Solutions are mixtures because the components are NOT chemically combined.

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Solutions are homogeneous mixtures made up of very small particles that are actually molecules, atoms, or ions. Solutions are said to be in a single phase even though the components may have been in different phases before the solution was formed.
Pure gold is 24 carat. 14-carat gold contains 14 parts gold and 10 parts other metals. 14-carat gold is said to be a(n) alloy, which is a type of solid solution.
An example of a gaseous solution is air, which is made up mostly of oxygen and nitrogen when dry. The most common solutions are liquid solutions.
Because of the Tyndall effect, you can see the light beams from car headlights in a fog.

Word Bank:
air homogeneous single
alloy liquid solid
atoms oxygen Tyndall effect

Match the items from the left to the correct item on the right.

1. solvent a. a substance that dissolves other materials
2. solute b. are between those of a solution and a suspension
3. suspensions c. the scattering of light by a colloid or suspension
4. A colloid’s particles d. the substances separate after standing a while, can be separated by filtration
5. Emulsions e. keeps the particles mixed
6. An emulsifying agent f. The substance being dissolved
7. The Tyndall effect g. are actually colloids comprised of one liquid in another liquid
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1. A, 2. F, 3. D, 4. B, 5. G, 6. E, 7. C

Match the items from the left to the correct item on the right.

1. aqueous solution a. does not exhibit the Tyndall Effect
2. electrolytes b. substances that do NOT conduct electricity when dissolved
3. nonelectrolytes c. Substances that conduct electricity when dissolved
4. solution with a beam of light shined through it d. exhibits the Tyndall Effect
5. suspension with a beam of light shined through it e. a product of a reaction that is an insoluble substance
6. precipitate f. solid solution of different metals
7. alloy g. a solution in which water is the solvent
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1. G, 2. C, 3. B, 4. A, 5. D, 6. E, 7. F