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2026/2027 CHEM 219 FINAL EXAM CURRENT
TESTING QUESTION AND DETAILED CORRECT
ANSWER (VERIFIED) GUARANTEED PASS/TOP-
RATED A+.
CHEM 219
Ace your CHEM 219 final exam with this comprehensive guide,
designed to master advanced organic chemistry concepts
including reaction mechanisms, synthesis strategies, and
spectroscopic analysis. This resource delivers high-yield
practice problems covering functional groups, stereochemistry,
and multistep transformations.
When an electrolyte solution (such as NaCl) is added to ice,
the ions have ______ with water molecules and thus
______the ability of the water molecules to form a solid ice
structure. ...... ANSWER ....... When an electrolyte
solution (such as NaCl) is added to ice, the ions have
strong intermolecular interactions with water molecules
and, thus, decrease the ability of the water molecules to
form a solid ice structure. A strong intermolecular
attraction between the ions and water can prevent water
molecules from packing tightly with each other.
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CaCl₂ is often used to melt ice on sidewalks. Calcium
chloride is more effective at melting ice than NaCl. Choose
the best explanation for this observation. ...... ANSWER
....... CaCl₂ dissociates into three ions increasing the
concentration of solute species in solution. The ions have
strong intermolecular interactions with water molecules
and, thus, decrease the ability of the water molecules to
pack tightly with each other. The more ions present, the
harder it is to crystallize water into ice.
_________ is a measure of the tendency of a material to
change into the gaseous state ...... ANSWER ....... Vapor
pressure is a measure of the tendency of a material to
change into the gaseous state. The molecules are moving
rapidly and if they have enough energy they will escape
from the liquid.
The boiling point of a liquid is the temperature at which its
vapor pressure is _______ the pressure of the gas above it. A
liquid with strong intermolecular attractions will have a
_______ vapor pressure and a higher boiling point ......
ANSWER ....... The boiling point of a liquid is the
temperature at which its vapor pressure is equal to the
pressure of the gas above it. A liquid with strong
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intermolecular attractions will have a low vapor pressure
and a higher boiling point.
What is the strongest intermolecular force in an aqueous
sodium chloride solution? ...... ANSWER ....... The
strongest intermolecular force in an aqueous sodium
chloride solution is ion-dipole. The oxygen of water is
partially negative and attracted to the positively charged
sodium ions. The hydrogen atoms of water have a
partially positive charge, which is attracted to the
negatively charged chloride ions.
The intermolecular force between the water and the ions in
solution is stronger than the intermolecular force between
two water molecules. The presence of the solute (NaCl) will
cause the vapor pressure to ______ and will ______ the
boiling point. ...... ANSWER ....... The intermolecular
force between the water and the ions in solution is
stronger than the intermolecular force between two
water molecules. The presence of the solute (NaCl) will
cause the vapor pressure to decrease and will increase
the boiling point of the solution.
2026/2027 CHEM 219 FINAL EXAM CURRENT
TESTING QUESTION AND DETAILED CORRECT
ANSWER (VERIFIED) GUARANTEED PASS/TOP-
RATED A+.
CHEM 219
Ace your CHEM 219 final exam with this comprehensive guide,
designed to master advanced organic chemistry concepts
including reaction mechanisms, synthesis strategies, and
spectroscopic analysis. This resource delivers high-yield
practice problems covering functional groups, stereochemistry,
and multistep transformations.
When an electrolyte solution (such as NaCl) is added to ice,
the ions have ______ with water molecules and thus
______the ability of the water molecules to form a solid ice
structure. ...... ANSWER ....... When an electrolyte
solution (such as NaCl) is added to ice, the ions have
strong intermolecular interactions with water molecules
and, thus, decrease the ability of the water molecules to
form a solid ice structure. A strong intermolecular
attraction between the ions and water can prevent water
molecules from packing tightly with each other.
, Page 2 of 27
CaCl₂ is often used to melt ice on sidewalks. Calcium
chloride is more effective at melting ice than NaCl. Choose
the best explanation for this observation. ...... ANSWER
....... CaCl₂ dissociates into three ions increasing the
concentration of solute species in solution. The ions have
strong intermolecular interactions with water molecules
and, thus, decrease the ability of the water molecules to
pack tightly with each other. The more ions present, the
harder it is to crystallize water into ice.
_________ is a measure of the tendency of a material to
change into the gaseous state ...... ANSWER ....... Vapor
pressure is a measure of the tendency of a material to
change into the gaseous state. The molecules are moving
rapidly and if they have enough energy they will escape
from the liquid.
The boiling point of a liquid is the temperature at which its
vapor pressure is _______ the pressure of the gas above it. A
liquid with strong intermolecular attractions will have a
_______ vapor pressure and a higher boiling point ......
ANSWER ....... The boiling point of a liquid is the
temperature at which its vapor pressure is equal to the
pressure of the gas above it. A liquid with strong
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intermolecular attractions will have a low vapor pressure
and a higher boiling point.
What is the strongest intermolecular force in an aqueous
sodium chloride solution? ...... ANSWER ....... The
strongest intermolecular force in an aqueous sodium
chloride solution is ion-dipole. The oxygen of water is
partially negative and attracted to the positively charged
sodium ions. The hydrogen atoms of water have a
partially positive charge, which is attracted to the
negatively charged chloride ions.
The intermolecular force between the water and the ions in
solution is stronger than the intermolecular force between
two water molecules. The presence of the solute (NaCl) will
cause the vapor pressure to ______ and will ______ the
boiling point. ...... ANSWER ....... The intermolecular
force between the water and the ions in solution is
stronger than the intermolecular force between two
water molecules. The presence of the solute (NaCl) will
cause the vapor pressure to decrease and will increase
the boiling point of the solution.
