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The Chemistry of Everything (Waldron)
Chapter 4 Salt
Note: Answers are included in this practice test. This is an exception, not the
rule.
An ionic interaction is _____,
A)
an attraction between positive and negative charges
B)
attraction due to shared electron pairs
C)
repulsion due to an excessive number of electrons between two atoms
D)
gain or loss of electrons to achieve an electron arrangement identical to that of a noble gas
E)
the movement of electrons from the negative electrode to the positive electrode in an electrochemical
system
Answer
A
Diff: 1
Type: MC
Var: 1
Page Ref: Sec 4.
Because of the strength of ionic attractions, salts generally have relatively low melting points and boiling
points.
Answer
False
Diff: 1
Type: TF
Var: 1
Page Ref: Sec 4.
A bromide ion contains _____ electrons and a bromine atom contains _____ electrons.
A)
B)
C)
D)
E)
Answer
A
Diff: 4
Type: BI
Var: 1
Page Ref: Sec 4.
A magnesium ion contains _____ electrons and a magnesium atom contains _____ electrons.
A)
B)
C)
D)
E)
Answer
An oxide ion contains the same number of electrons as a(an) atom of _____.
A)
neon
B)
fluorine
C)
oxygen
D)
nitrogen
E)
carbon
Answer
A
Diff: 4
Type: BI
Var: 1
Page Ref: Sec 4.
Unlike ionic solids, the ions in ionic liquids do not pack together tightly to form crystals because the ions
have dissimilar sizes or shapes or both.
Answer
True
Diff: 1
Type: TF
Var: 1
Page Ref: Sec 4.
Which statement is not a reason that ionic liquids remain in the liquid phase?
A)
The cations differ greatly from the anions in shape.
B)
The cations differ greatly from the anions in size.
C)
The charge of the larger ion is greatly delocalized.
D)
The charge of the smaller ion is concentrated in a very small volume.
E)
The strength of the electrostatic attractions among the ions is relatively small.
Answer
D
Diff: 4
Type: MC
Var: 1
Page Ref: Sec 4.
The formula of a newly discovered ionic liquid is C 10
H
F
NP. This compound consists of one ion of
6
PF
and one ion of C 10
H
16
N
. The molar mass of the cation is _____ g/mole.
A)
B)
C)
D)
E)
Answer
A
Diff: 9
Type: BI
Var: 1
Page Ref: Sec 4.
The formula of a newly discovered ionic liquid is C 10
H
F
NP. This compound consists of one ion of
6
PF and one ion of C 10
H
16
N
. The molar mass of the compound is _____ g/mole.
A)
B)
C)
D)
E)
Answer
E
Diff: 9
Type: BI
Var: 1
Page Ref: Sec 4.
Draw the dot structure of the carbonate ion,
2-
3
CO. Use your drawing to answer the questions.
The total number of electrons in your drawing of the carbonate ion is _____.
A)
B)
C)
D)
E)
A
Diff: 9
Type: BI
Var: 1
Page Ref: Sec 4.
The number of double bonds in your drawing of the carbonate ion is _____.
A)
B)
C)
D)
E)
impossible to determine
Answer
A
Diff: 9
Type: BI
Var: 1
Page Ref: Sec 4.
It is possible to draw three resonance-stabilized structures for the carbonate ion.
Answer
True
Diff: 4
Type: TF
Var: 1
Page Ref: Sec 4.
The formula for the compound calcium phosphate is Ca 3
(PO
4
2
Answer
True
Diff: 4
Type: TF
Var: 1
Page Ref: Sec 4.
The formula for the compound aluminum sulfate is AlSO 4
Answer
False
Diff: 4
Type: TF
Var: 1
Page Ref: Sec 4.
The formula for the compound ammonium nitrate is NaNO 3
Answer
False
Diff: 4
Type: TF
Var: 1
Page Ref: Sec 4.
A substance that acts as a drying agent by removing water from a substance is called a(an) _____.
A)
dessicant
B)
surfactant
C)
solvent
D)
solution
E)
ionic liquid
Answer
A
Diff: 1
Type: MC
Var: 1
Page Ref: Sec 4.
A molecule in which the electron density is evenly distributed over the entire surface of the molecule is
said to be polar.
Answer
False
Diff: 1
Type: TF
Var: 1
Page Ref: Sec 4.
A molecule which has polar bonds must be a polar molecule.
Answer
False
repulsion of like charges
E)
electromagnetic attractions
Answer
A
Diff: 9
Type: MC
Var: 1
Page Ref: Sec 4.
In choosing a solvent to dissolve a nonpolar substance such as grease, the best choice would be a polar
substance.
Answer
False
Diff: 9
Type: TF
Var: 1
Page Ref: Sec 4.
When sodium nitrate is dissolved in water, the oxygen of the water molecule interacts with the sodium
ion.
Answer
True
Diff: 4
Type: TF
Var: 1
Page Ref: Sec 4.
In a saturated solution of sodium nitrate, no changes are occurring because the amount of visible solid in
the container remains constant.
Answer
False
Diff: 4
Type: TF
Var: 1
Page Ref: Sec 4.
A
Diff: 4
Type: MC
Var: 1
Page Ref: Sec 4.
The symbolism which correctly represents a chloride ion dissolved in water is _____.
A)
Cl 2 (l)
B)
Cl
(aq)
C)
Cl
(l)
D)
Cl(aq)
E)
Cl 2 (aq)
Answer
B
Diff: 4
Type: MC
Var: 1
Page Ref: Sec 4.
A solution is labeled "0.60 M sucrose." This solution is _____ mM.
A)
B)
C)
D)
E)
Answer
C
Diff: 4
Type: BI
Var: 1
Page Ref: Sec 4.
The unit M represents the molarity of a solution, or moles of dissolved substance per milliliter of solution.
Answer
False
Diff: 4
Type: TF
Var: 1
Page Ref: Sec 4.
A solution is prepared by dissolving 60.0 g of glucose, C 6
H
O
, in enough water to make 0.800 L of
solution. The molarity of this solution is _____ M.
A)
B)
C)
D)
E)
Answer
A
A technician wants to dispose of 2.00 L of a 0.500 M solution by diluting it with water and pouring down
the drain. For this particular substance, this is legal if the final concentration of the contaminant is less
than 1.00 mM. How much solution will be produced when he adds enough water to get the proper
concentration?
A)
100 L
B)
1000 L
C)
0.500 L
D)
1,000,000 L
E)
4.00 L
Answer
B
Diff: 9
Type: BI
Var: 1
Page Ref: Sec 4.
A demonstration contains two compartments of liquid separated by a semipermeable membrane that only
allows water to cross.. Side A contains 200 mL 0.1 M CaCl 2
solution. Side B contains 200 mL 0.5 M
CaCl 2
solution. Which statements correctly describe the setup after the system has reached equilibrium?
A)
The level of B will be higher than it was initially.
B)
The level of B will be lower than it was initially.
C)
The level of A will be higher than it was initially.
D)
The level of A will be lower than it was initially.
E)
The levels will be the same as the initial levels.
Answer
A, D
Diff: 9
Type: MC
Var: 1
Page Ref: Sec 4.
A demonstration contains two compartments of liquid separated by a semipermeable membrane that only
allows water to cross.. Side A contains 200 mL 0.1 M CaCl 2
solution. Side B contains 200 mL 0.1 M NaCl
solution. Which statements correctly describe the setup after the system has reached equilibrium?
A)
The level of B will be higher than it was initially.
B)
The level of B will be lower than it was initially.
C)
The level of A will be higher than it was initially.
D)
The level of A will be lower than it was initially.
E)
The levels will be the same as the initial levels.
Answer
B, C
Diff: 9
Type: MC
Var: 1
Page Ref: Sec 4.
A semipermeable membrane is one which
A)
allows only certain molecules to pass from one solution to another.
B)
prevents transfer of heat from one solution to another.
C)
