PORTAGE LEARNING CHEM 210 MODULE 4
PRACTICE EXAM 2026
◉ This term/concept describes why grocers spray fruits and
vegetables periodically to make them look fresh. Answer: osmosis
◉ what is the reason why icy roads are sprayed with salt in the
winter time. Answer: the salt lowers the temperature at which the
water on the roads will freeze "Freezing Point Depression"
◉ what do we call the dip at the top of the water level in a graduated
cylinder. Answer: meniscus
◉ if the maximum amount of solute that can dissolve in 100 mL of
water is 24 grams . what would the solution be called if we forced 26
g of solute in it. Answer: supersaturated
◉ this type of solution has particles floating at the top and settled at
the bottom. Answer: suspension
◉ this phenomenon occurs when a laser passes through a colloid
and is also seen in the path of light caused by your car's headlights
on a foggy night. Answer: tyndall effect
,◉ what is the intermolecular force that binds water and molecules
together. Answer: hydrogen bonds
◉ why won't water and oil mix. Answer: "like dissolve likes" water is
polar and oil is non-polar
◉ this type of mixture is cloudy. Answer: colloid
◉ why do cooks often add salt to their boiling water. Answer: the
salt raises the temperature at which water boils and makes the
water hotter which cooks the food faster
◉ the term describes the number of moles in a Liter of solution
=moles/L. Answer: molarity
◉ this type of solution does not hold the maximum amount of solute
that a certain amount of solvent can hold. Answer: unsaturated
◉ when most solutes are dissolved, heat is absorbed. what type of
reaction is this. Answer: endothermic
◉ what is an excellent solvent for most solutes. Answer: water
, ◉ what does Na1+(aq) mean. Answer: .1 moles of Ba(NO3)2 in one
liter of solution
it is its molarity or the solution concentration
◉ what do you call the force needed to overcome the interparticle
attractions and"break through" the surface of a liquid?. Answer:
surface tension
◉ explain how a meniscus is formed in a thin glass tube. Answer:
because of the strong surface tension
◉ explain why water beads up and why insects or leaves can "float"
on water. Answer: because hydrogen in water are strong and form a
"surface"
◉ how does a "diluted" solution compare to a concentrated solution.
Answer: diluted is low molarity, concentration is high molarity
◉ how does a saturated solution compare to a unsaturated solution.
Answer: saturated is full, unsaturated can hold more
PRACTICE EXAM 2026
◉ This term/concept describes why grocers spray fruits and
vegetables periodically to make them look fresh. Answer: osmosis
◉ what is the reason why icy roads are sprayed with salt in the
winter time. Answer: the salt lowers the temperature at which the
water on the roads will freeze "Freezing Point Depression"
◉ what do we call the dip at the top of the water level in a graduated
cylinder. Answer: meniscus
◉ if the maximum amount of solute that can dissolve in 100 mL of
water is 24 grams . what would the solution be called if we forced 26
g of solute in it. Answer: supersaturated
◉ this type of solution has particles floating at the top and settled at
the bottom. Answer: suspension
◉ this phenomenon occurs when a laser passes through a colloid
and is also seen in the path of light caused by your car's headlights
on a foggy night. Answer: tyndall effect
,◉ what is the intermolecular force that binds water and molecules
together. Answer: hydrogen bonds
◉ why won't water and oil mix. Answer: "like dissolve likes" water is
polar and oil is non-polar
◉ this type of mixture is cloudy. Answer: colloid
◉ why do cooks often add salt to their boiling water. Answer: the
salt raises the temperature at which water boils and makes the
water hotter which cooks the food faster
◉ the term describes the number of moles in a Liter of solution
=moles/L. Answer: molarity
◉ this type of solution does not hold the maximum amount of solute
that a certain amount of solvent can hold. Answer: unsaturated
◉ when most solutes are dissolved, heat is absorbed. what type of
reaction is this. Answer: endothermic
◉ what is an excellent solvent for most solutes. Answer: water
, ◉ what does Na1+(aq) mean. Answer: .1 moles of Ba(NO3)2 in one
liter of solution
it is its molarity or the solution concentration
◉ what do you call the force needed to overcome the interparticle
attractions and"break through" the surface of a liquid?. Answer:
surface tension
◉ explain how a meniscus is formed in a thin glass tube. Answer:
because of the strong surface tension
◉ explain why water beads up and why insects or leaves can "float"
on water. Answer: because hydrogen in water are strong and form a
"surface"
◉ how does a "diluted" solution compare to a concentrated solution.
Answer: diluted is low molarity, concentration is high molarity
◉ how does a saturated solution compare to a unsaturated solution.
Answer: saturated is full, unsaturated can hold more
