Don't write on this test.
1. Is the diameter of a stirring rod closer to 6 mm or closer to 6 cm?
2. Is a gallon closer to 38 ml or closer to 3.8 L?
3. Which is the largest use of water in the western U.S.?
A) Manufacturing B) Home C)Irrigation D) Electric plant cooling
4. Which of the following correctly reflects the decreasing order of
abundance of water supplies?
A) oceans-glaciers/icecaps-groundwater-lakes-atmosphere
B) glaciers/icecaps--oceans-rivers--groundwater--lakes--atmosphere
C) oceans--atmosphere--glaciers/icecaps--rivers--lakes--groundwater
D) none of the above
5. Which of the following remove odors from water?
A) Oil separation B) Charcoal filtration C) Sand filtration
6. In the funky water lab sand filtration removed
A) Charcoal B) Solids C) Odors D) Oil
7. We need this amount of water daily in some form
A) << L B) 1 L C) 2 L D) 5 L
8 Which is an example of indirect water use?
A) 325 L of water are consumed by a citizen daily
B) A shower uses 19 L of water a minute
C) My water bill is $ 485.89 /month
D) 120 L of water are required to produce a 1.3 L juice can
9. The advantage of the metric system is that the units all convert by factors
of
A) tens B) hundreds C) both a and c d) math is a word
10. To find the percent of purified water in the funky water lab we
A) Volume of water purified/ Volume of funky water
B) Volume of funky water/ Volume of water purified
C) Volume of water purified -Volume of funky water
D) Read the answer from the breaker
Don't write on this test.
In the following use matching
11. Aeration A. Removes bad odors
12. Centi B. Liquid collected after passing a mixture through
13. Graduated Cylinder C. Removes largest particles
14. Chlorine D. Works by differences in density and solubility
15. Evaporation E. Rivers, lakes and streams are an example
16.Condensation F. Fixed volume and a fixed shape
17. Liquid G. 92 % of the worlds water supply
18. 1 cm 3 H. The formation of clouds
19. Surface water I . Porous rock which contains water
20. Ground water J. Attracts and holds
21. Deci K. 1000 mL
22. Solid L. Large number of aerobic bacteria digest sludge
23. Oil-water separation M. 1 mL
24. Gas N. Has a definite volume
25. Sand Filtration O. Well water
26. Filtrate P. No fixed volume , no fixed shape
27. Charcoal Adsorption Q. 1/10
28. Ocean water U. A disease caused by dirty water
29. 1L = R. .001 % of world water supply
30. Aquifer S. Occurs when the sun shines on wet surfaces
31. Adsorbs T. 1/100
32. Typhoid V. Rain, sleet, and snow are examples of
W. Added to waste water
DO NOT WRITE ON THIS TEST
1. What causes a warm bottle of pop to explode when placed in the freezer
over night?
A) The water in the bottle contracts when it freezes.
B) The glass bottle contracts when it freezes.
C) The water expands when it freezes.
D) The glass bottle expands when it freezes.
2. If the instructions on a bottle of medicine say "shake before using" the
material inside is probably a
A) solution B) colloid C) suspension D) pure liquid
3. The space of the water molecule is best described as
A) linear B) v shaped C) circular D) water molecule has no shape
4. When we say water is very polar what do we mean ?
A) Water is very cold and comes from the polar regions.
B) One end of the molecule has a slight positive charge and the opposite
end has a slight negative charge.
C) The molecule itself has a slight electrical charge.
D) The molecule is magnetic and can be used as a compass.
5. A clear green liquid is sitting in a beaker. When a beam of light is
aimed
through the beaker the bean cannot distinctly be seen in the liquid. What
kind of liquid is this?
A) suspension B) colloid C) solution D) slime juice
6. We can never get completely pure water because
A) the government is cheap B) dissolved gases remain in all water C) we
must save chorine for future use D) water is already pure
7. Qualitative tests measure
A) color and precipitate B) color and mass C) precipitate and
mass D) mass and volume
8. In a lab we rinse the well plates with distilled water to
A) follow safety first and always rules B) remove colloids C) prevent
contamination from stray ions D) make less mess and waste less water
9. The following is not an ion
A) NaCl B) Ca+ C) Cl - D) H+
10. Ice floats in water because
A) Ice is denser than water B) water is less dense than ice C) cold
things rise D)water is denser than water
11. Which is the correct ranking of waters densities ?
A) gas, solid, liquid B) gas, liquid, solid D)solid, gas, liquid D)liquid,
gas, solid
12. Surface tension of water is
A) a chemical property of water B) the way clouds are formed C)
the way water stays on plants D) shown by the Tyndall effect
DO NOT WRITE ON THIS TEST
13. Which of the following is an incorrect inventory of this balanced
equation
S8 + 8O2 ---> 8SO2
A. 1 molecule of S8 reacts with 8 molecules of O2 to form 8 molecules
of SO2
B. 1 atom of S8 reacts with 8 atoms of SO2
C. 8 atoms of S react with 16 atoms of O and form 8 molecules of SO2
D. 1 atom of S reacts with 2 atoms of O and form 2 molecules of SO2
14. Which statement correctly describes the atoms in the molecule
Ca(OH)2
A. 1 calcium, 1 oxygen, 2 hydrogen
B. 1 calcium, 2 oxygens, 2 hydrogens
C, 2 calcium, 2 oxygens, 2 hydrogens
Mark an (A) for solution, mark (B) for suspension , mark ( C) for colloid
15. Milk 16. Pepsi 17. Jell 18. Pepto bismal
Matching
19. density A. Where the original substances of a chemical
formula are written
20. anion B. The dissolving agent
21. colloid C. Heavy metals that are a health risk
22. reactant side D. Having regions of positive and negative
charge
23. chemical bond E. Having large, dispersed particles
24. solute F. Used as a test against
25. gram G. Composed of two or more elements not
physically separable
26. cation H. The homogeneous mixture of two or more
substances
27. homogenous I. The dissolved substance
28. ion J. This happens at all temperatures and leads to
cloud formation
29. product side K. Positively charged particle present in
the nuclei
30. S, Pb, Ca, Ar L. Uniform throughout
31. solvent M. Dissolved gasses found in water
32. polar N. Measured usually in g/mL
33. heterogeneous O. Having a deficiency of electrons
34. N2, O2, CO2 P. Where formulas are written indicating new
substances
35. compound Q. Indicate how many atoms are in a molecule
36. evaporation R. The glue in molecules
37. suspension S. Scientific facts
38. solution T. An atom or group of atoms that is electrically
charged
39. control U. Not uniform through out
40. protons V. Unit of mass
41. subscript W. Macro-size particle that remains in a
suspension
42. data X. Has excess electrons
Write the element or the element's symbol given the following
information
43. Tin
44. Al
45. Sodium
46. Ca
47. Potassium
48. Pb
49. Mercury
TEST WATER SECTION B NAME_______________________
WRITE ON THIS TEST HOUR_________
1.
8.
15.
22.
29.
36.
43.
2.
9.
16.
23.
30.
37.
44.
3.
10.
17.
24.
31.
38.
45.
4.
11.
18.
25.
32.
39.
46.
5.
12.
19.
26.
33.
40.
47.
6.
13.
20.
27.
34.
41.
48.
7.
14.
21.
28.
35..
42.
49.
50. List three difficulties associated with the use of qualitative tests.
51. Describe how the chemistry is the international language of chemist.
52. What is the purpose of water's surface tension property?
53. Explain how water molecules stick together.
54. Considering water's bond describe why water has a high surface tension .
55. Besides water being odorless, tasteless, and clear what are three other
physical properties of
water.
EXTRA CREDIT
56. As members of the ChemCom Community what things have we tested water
for? How does
this compare to what Riverwood's scientists have tested and ruled out?
57. Complete this chart
O2-
SO42-
Cl-
PO43-
OH-
Mg2+
Na+
Al3+
Questions? Comments??