Chemistry Concepts and Applications

Chapter 13: Water and Its Solutions

Standardized Test Practice

1
Because water molecules at the surface are not completely surrounded by other molecules, they experience__________.

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A)a net outward force
B)a net inward force
C)repulsion from other molecules
D)attraction to their container
2
The solubility of most solutes __________ as the temperature goes up.
A)decreases
B)stays the same
C)increases
D)first increases, then decreases
3
Within water molecules the bonds are __________ bonds. Between water molecules the bonds are __________ bonds.

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A)hydrogen, hydrogen
B)covalent, covalent
C)hydrogen, covalent
D)covalent, hydrogen
4
The atoms in the water molecule are linked by __________ bonds.
A)ionic
B)polar covalent
C)pure covalent
D)triple
5
The water molecule is polar partly because of its __________.
A)geometry
B)weight
C)mass
D)volume
6
The bond angle in the water molecule is about __________.
A)105°
B)90°
C)45°
D)180°
7
The attractions between water molecules are called __________.
A)covalent bonding
B)hydrogen bonding
C)ionic bonding
D)weak bonding
8
The __________ state of water is highly organized.
A)gas
B)liquid
C)plasma
D)solid
9
Water forms drops because of its __________.
A)mass
B)polarity
C)surface tension
D)volume
10
Because of its __________, a large body of water helps moderate the temperature of the surrounding area.
A)boiling point
B)high specific heat
C)low density
D)low specific heat
11
Water's __________ helps keep you cool on a hot day.
A)high heat of vaporization
B)low density
C)low freezing point
D)large volume
12
A solution that contains very little solute is described as __________.
A)concentrated
B)dilute
C)massive
D)saturated
13
A __________ solution contains more than the usual maximum amount of solute.
A)concentrated
B)dilute
C)saturated
D)supersaturated
14
A solute __________ of the solvent.
A)does not affect
B)lowers the boiling point
C)raises the boiling point
D)raises the freezing point
15
Driven by concentration difference, the movement of molecules through a semipermeable memebrane is called __________.
A)boiling
B)capilarity
C)osmosis
D)reverse movement
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