Worksheet: Solutions Introduction Name K

Worksheet: Solutions Introduction

KEY

Name______________

1. Explain why solutions are classified as mixtures instead of compounds.

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.

homogeneous

2. Solutions are ________________

mixtures made up of very small particles

atoms

ions

that are actually molecules, __________,

or ________.

single

3. Solutions are said to be in a ______________

phase even though the

components may have been in different phases before the solution was formed.

4. Pure gold is 24 carat. 14-carat gold contains 14 parts gold and 10 parts other

alloy

metals. 14-carat gold is said to be a(n) ___________,

which is a type of

solid

_______________

solution. An example of a gaseous solution is

air

oxygen

________________, which is made up mostly of ______________

and

liquid

nitrogen when dry. The most common solutions are ______________

solutions.

5. Define miscible:

Miscible liquids will dissolve in each other.

6. Define immiscible:

Immiscible liquids will not dissolve in each other.

Tyndall

Effect

7. Because of the _______________

_______________,

you can see the light

beams from car headlights in a fog.

8. Multiple choice: To increase the rate of solution of a solid in water,

a. increase the pressure over the water.

b. decrease the pressure over the water.

c. crush the particles of the solid.

d. chill the water.

9. If 15 grams of iodine are dissolved in 1000 mL of alcohol, the alcohol is the

tincture

(solute, solvent) and the solution is said to be a(n) _______________.

10. A substance that dissolves other materials is a (solute, solvent). The substance

being dissolved is a (solute, solvent).

CHEMISTRY: A Study of Matter

? 2004, GPB

10.7a

11. In (solutions, suspensions) the substances separate after standing a while. The

substances (can also, can not) be separated by filtration.

suspension

12. Smoke is an example of a _____________

of solid dirt and dust particles in

air. After a while, the solid particles will fall to the ground.

colloid

13. A(n) ________________¡¯s

particles are between those of a solution and a

suspension.

Emulsions

14. ________________

are actually colloids comprised of one liquid in another

emulsifying

liquid. A(n) ______________

agent keeps the particles mixed.

15. What is an aqueous solution?

An aqueous solution is one in which water is the solvent.

16. What is the solute in a brass alloy containing 75% copper and 25% zinc?

zinc

17. How does a solution behave differently from a suspension when a beam of light

is shined through it?

A solution does not exhibit the Tyndall Effect when a beam of light is shined through it

although suspensions do exhibit the Tyndall Effect.

18. Substances that conduct electricity when dissolved are said to be

electrolytes

______________,

while substances that do NOT conduct electricity when

dissolved are said to be __________________.

nonelectrolytes

CHEMISTRY: A Study of Matter

? 2004, GPB

10.7b

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