Group Activity 7
Member Names: 1)________________________________
3)________________________________
2)________________________________
4)________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) What is the concentration, in m/m%, of a solution prepared from 50.0 g NaCl and 150.0 g of water?
A) 0.250%
B) 25.0%
C) 33.3%
D) 3.00%
1)
E) 40.0%
2) An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed
in a dialyzing bag and immersed in distilled water. Which of the following correctly describes the
location of the indicated substance after dialysis?
2)
A) albumin inside and outside
B) water inside only
C) starch inside and outside
D) albumin, inside
E) starch outside
3) When some of the sugar added to iced tea remains undissolved at the bottom of the glass, the
solution is
3)
A) polar.
B) dilute.
C) nonpolar.
D) saturated.
E) unsaturated.
4) A homogeneous mixture that does not settle out upon standing is
A) hydrated.
B) an element.
C) homogeneous.
D) a suspension.
E) a colloid.
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4)
5) A red blood cell will undergo crenation in
5)
A) 3% glucose.
B) 0.5% NaCl.
C) water.
D) 7% NaCl.
E) 5% glucose.
6) How many grams of glucose are needed to prepare 400. mL of a 2.0%( m/v) glucose solution?
A) 2.0 g
B) 800. g
C) 0.0050 g
D) 8.0 g
6)
E) 200. g
For the question(s) that follow, consider a 4% starch solution and a 10% starch solution separated by a semipermeable membrane.
7) Which of the following also occurs in this system?
7)
A) Starch moves out of the 10% starch solution into the 4% starch solution.
B) Water flows equally in both directions.
C) Water does not cross the membrane at all.
D) There is a net flow of water from the 4% starch solution into the 10% starch solution.
E) There is a net flow of water from the 10% starch solution into the 4% starch solution.
8)
8) A hydrogen bond is
A) the polar O-H bond in water.
B) an attraction between a hydrogen atom attached to N, O, or F and an N, O, or F atom.
C) an ionic bond between H and another atom.
D) a covalent bond between H and O.
E) a bond that is stronger than a covalent bond.
9) Which of the following molecules can form hydrogen bonds?
A) HI
B) BH3
C) NaH
10) In a solution, the solvent
9)
D) NH3
E) CH4
10)
A) can be a solid, liquid, or gas.
B) is a liquid.
C) is never a solid.
D) is the substance present in the smallest concentration.
E) can be a liquid or gas.
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MATCHING. Choose the item in column 2 that best matches each item in column 1.
Identify the term defined in each description.
11) a solution in which more solute can be
dissolved
A) hydration
11)
B) unsaturated
12) a solution that contains the highest
amount of solute that dissolves at a
given temperature
12)
C) hypertonic
13) a solution that has a higher osmotic
pressure than the red blood cells of
the body
D) saturated
14) the association of several water
molecules with ions produced in a
solution
F) hypotonic
13)
E) hydrogen bonding
14)
15)
15) the major attraction between water
molecules
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Answer Key
Testname: GROUP ACTIVITY 7
1) B
2) D
3) D
4) E
5) D
6) D
7) D
8) B
9) D
10) A
11) B
12) D
13) C
14) A
15) E
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