Download Extra Credit Test Review

Test Review
Chapters 2-2 and 4 Matter
Name __________________________________
1. Name 3 ways to separate a mixture. Evaporation, magnetism, filtering, sorting/separating, using a
centrifuge, distillation
2. A _compound___ has a definite ratio of composition.
3. Chocolate milk could be described as which mixture? ___suspension___ (you must shake it up!)
4. A compound is separated only by ____chemical___ means.
5. Which of the following does NOT describe elements?
a. all the particles are alike
b. can be broken down into simpler substances
c. have unique sets of properties
d. can join together to form compounds
e.
6. A solution that contains a small amount of solute is best described as
( concentrated / unsaturated / dilute ).
7. Which of the following would usually NOT increase the rate at which a solid dissolves?
a. decreasing the temperature
c. stirring
b. crushing the solid
d. increasing the temperature
8. How would you separate a mixture of: A) salt & water evaporation
B) lead filings & aluminum pieces magnetism
9. Elements that are __metalloids__ are referred to as semiconductors.
10. A __centrifuge___ is used by medical labs to separate heavier blood cells from liquid plasma.
11. Water is often called the ___Universal Solvent__.
12. A solution is a ( heterogeneous / homogeneous ) mixture.
13. Examples of solutions can be in the form of
a. liquids
c. solids
b. gases
d. all of the above
14. An unknown sample scatters light and is separated by a filter. The sample is most likely a(n)
__suspension___.
15. Which of the following is an element?
a. sodium chloride
c. sodium hydroxide
b. sodium
d. sodium sulfate
16. A colloid
a.
b.
c.
d.
can be separated by filtration.
is only made of solids.
does not scatter a light beam.
is a mixture in which the particles are too small to be filtered.
17. Which of the following is NOT a mixture?
a. brass
c. ocean water
b. air
d. carbon dioxide
18. A pure substance must be a(n) ___element__.
19. __Metals____ are elements that are shiny and are good conductors of thermal energy and electric
current.
20. Light will scatter when it passes through which types of mixtures? Colloids & suspensions_____
21. Elements that are brittle and dull are ___nonmetals___.
22. In the graph below, which solid’s solubility decreases as temperature increases? Ce2(SO3)3
23. In the graph below, how much of each of the following is needed to make a saturated solution at 60°C?
KNO3 110g KClO3 23g
KCl 45g
Ce2(SO3)3 4g
Solubility diagram (2013). Retrieved from the ScienceGeek.net website:
http://www.sciencegeek.net/Chemistry/taters/solubility.htm
24. A spoonful of sugar is mixed into a glass of iced tea. The iced tea is the ___solvent__ and the sugar is
the __solute__.
25. Review: Determine whether the following are chemical or physical changes:
a. butter melts physical
b. tearing up a test physical
c. baking a cake chemical
d. demolishing a house physical
e. using a kit to dye your hair blue chemical