Chem 1010 - General Chemistry 1 » Summer 2022 » Quiz 8
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Question #1
Solutions form when efficient intermolecular forces can form between solvent molecules and solute molecules or ions. What kind of intermolecular forces could be responsible?
A.
hydrogen bonds
B.
dipole-dipole
C.
All of these
D.
London
Question #2
If two liquids are miscible, they _____ because _____.
A.
mix together; their intermolecular interactions are dissimilar
B.
do not mix together; their intermolecular interactions are dissimilar
C.
do not mix together; their intermolecular interactions are similar
D.
mix together; their intermolecular interactions are similar
Question #3
Two liquids which mix together in all proportions are said to be _____; they mix because _____.
A.
miscible; their intermolecular interactions are dissimilar
B.
immiscible; their intermolecular interactions are dissimilar
C.
immiscible; their intermolecular interactions are similar
D.
miscible; their intermolecular interactions are similar
Question #4
Which of the following liquids is least soluble in water?
A.
methanol (CH3OH)
B.
acetic acid (CH3CO2H)
C.
ethanol (CH3CH2OH)
D.
dimethyl ether (CH3OCH3)
Question #5
The process of forming a solution occurs in three parts: separating solvent molecules, separating solute particles, and forming new solute-solvent associations. These three processes are, respectively
A.
endothermic, endothermic, and endothermic.
B.
endothermic, exothermic, and endothermic.
C.
endothermic, endothermic, and exothermic.
D.
exothermic, exothermic, and endothermic.
Question #6
The _____ of a substance is defined as the maximum amount that dissolves in a given amount of solvent at a specified temperature
A.
solubility
B.
Concentration
C.
Molarity
D.
Latiice Energy
Question #7
When a solution is supersaturated the concentration of the solute is _____ the solubility, and _____ solute will dissolve
A.
equal to; no more
B.
greater than; no more
C.
less than; no more
D.
greater than; more
Question #8
Salts containing only doubly or triply charged ions are often insoluble in water. This could be because
A.
All of these
B.
the ions are highly charged, and a large number of water molecules is organized around them, so S is negative
C.
the ions are highly charged, hence the lattice energy is very large, and H therefore tends to be negative.
D.
the ions are very large, hence the lattice energy is very large, and H is positive.
Question #9
Thermal pollution affects fish and other marine wildlife by
A.
increasing the uptake of toxic metals.
B.
hindering the growth of marine plants.
C.
raising the body temperature of fish to a dangerous level.
D.
decreasing the solubility of oxygen in water.
Question #10
The solubility of a gas in a liquid is _____ the pressure of the gas; this is _____.
A.
proportional to the square of; Raoult's Law
B.
proportional to; Henry's Law
C.
inversely proportional to; Henry's Law
D.
inversely proportional to; Raoult's Law
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