Straighterline Chemistry Final Exam 2025/2026 Questions With Completed & Verified Solutions.

Straighterline Chemistry Final

_____ is a trend that describes ligands from strong field to weak field.

Electronegativity
The spectrochemical series
The crystal field model - ANS -The spectrochemical series
\77 K is colder than 4 K.

Select one:
True
False - ANS -False
\A cation has a ______ charge. - ANS -positive
\A CH3COOH/CH3COO- buffer can be produced by adding a strong acid to a solution of
CH3COO- ions.

Select one:
True
False - ANS -True
\A complex ion that undergoes a very slow exchange reaction is called an inert complex.

Select one:
True
False - ANS -True
\A concentration term commonly used for solutions that uses the volume of a solution is ______.
- ANS -Molarity
\A coordination environment where a metal is surrounded by six ligands is called _______.

Linear
Tetrahedral
Octahedral - ANS -Octahedral
\A face-centered crystal lattice has one atom in the center of the unit cell.

Select one:
True
False - ANS -False
\A hydrohalic acid is a binary acid containing a halogen.

Select one:
True
False - ANS -True
\A ligand that forms one bond to the metal is called a(n) _________.

,Ionic bond
Unidentate
Covalent bond - ANS -Unidentate
\A nuclear reaction's reaction rate is affected by temperature, pressure, and catalysts.

Select one:
True
False - ANS -False
\A particular temperature in degrees Celsius is larger than the temperature in kelvins.

Select one:
True
False - ANS -False
\A phase diagram is a diagram depicting the phases of a substance at different temperatures
and pressures.
True
False - ANS -True
\A reaction in which the same element gains and loses electrons is known as a(n) ________
reaction.

Acid-base
Dissolution
Disproportionation - ANS -Disproportionation
\A reaction where electrons are transferred from one reactant to another is called a(n)
__________ reaction.

Redox or oxidation-reduction
Acid-base
Ionic - ANS -Redox or oxidation-reduction
\A reduction in atomic radii caused by the 4f electrons being close to the nucleus is called
______.

Lanthanide contraction
Disproportionation
Spectrochemical series - ANS -Lanthanide contraction
\A sample of nitrogen gas at 298 K and 745 torr has a volume of 37.42 L. What volume will it
occupy if the pressure is increased to 894 torr at constant temperature?
Select one:
a. 22.3 L
b. 31.2 L
c. 44.9 L
d. 112 L
e. 380 L - ANS -b. 31.2 L

,\A scoop of vanilla ice cream is a pure substance.

Select one:
True
False - ANS -False
\A smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters
(depth). What is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)
Select one:
a. 58 cm3
b. 1.7 x 105 cm3
c. 90 cm3
d. 3.4 cm3
e. 34 cm3 - ANS -a. 58 cm3
\A spontaneous endothermic reaction always
Select one:
a. causes the surroundings to get colder.
b. bursts into flame.
c. requires a spark to initiate it.
d. releases heat to the surroundings. - ANS -a. causes the surroundings to get colder.
\A(n) _________ is a point at which a standing wave has zero amplitude.
Select one:
a. crevice
b. node
c. pit
d. burrow
e. orbital - ANS -b. node
\According to the VSEPR model, a molecule with the general formula AB5 with one lone pair on
the central atom will have a ______ molecular geometry.
Select one:
a. tetrahedral
b. trigonalbipyramidal
c. square pyramidal
d. octahedral
e. seesaw - ANS -c. square pyramidal
\According to the VSEPR model, the predicted molecular geometry of ammonia, NH3, is
Select one:
a. linear.
b. trigonal planar.
c. bent.
d. tetrahedral.
e. trigonal pyramidal. - ANS -e. trigonal pyramidal.
\Acetic acid is a very important industrial chemical and is produced by this reaction:

CH3OH(l) + CO(g) à CH3COOH(l)

, Calculate the value of the standard Gibbs Free Energy change for this reaction. Is acetic acid
thermodynamically stable compared with liquid water at standard conditions? Explain.

Compound

Standard Gibbs Free Energy (kJ/mol)

H2O (l)

-237.1

CH3COOH

-389.9

CH3OH (I)

-166.6

CO (g)

-137.3

A. ΔG°rxn = -86.0 kJ; At standard conditions, acetic acid is less thermodynamically stable than
water because it has a more negative value of ΔG°.

B. ΔG°rxn = -86.0 kJ; At standard conditions, acetic acid is more thermodynamically stable than
water because it has a more negative value of ΔG°.

C. ΔG°rxn = +86.0 kJ; At standard conditions, acetic acid is less thermodynamically stable than
water because it has a more negative value of ΔG°.

D. . ΔG°rxn = -0.017 kJ; At standard conditions, acetic acid is less t - ANS -A. ΔG°rxn = -86.0
kJ; At standard conditions, acetic acid is less thermodynamically stable than water because it
has a more negative value of ΔG°.
\Acetylene (properly known as ethyne) and calcium hydroxide are the products of the reaction
between calcium carbide (CaC2) and water. Ethyne can be easily set on fire. This can be done
on the surface of an ice cube, giving it the appearance of "burning ice". Identify the balanced
reaction for the combustion of ethyne and explain why it burns with intense heat.

A. 2C2H2 + 5O2 à 4CO2 + 2H2O; There is a lot of energy released in this reaction because
there is a triple bond between the carbons in ethyne, which contains a lot of energy, and this
energy is released when the bonds are broken.