Module 13 Chemistry Flashcards
(28 cards)
Which of the following are factors that affect the rate of dissolving?
agitation
temperature
surface area
all of the above
all of the above
When two liquids can be mixed in any proportion they are said to be completely _____ .
saturated
immiscible
miscible
unsaturated
miscible
The energy associated with the dissolving of a solute in a solvent is called ____ .
combustion
heat of solution
conflagration
entropy of solvation
heat of solution
A mixture with large, “settling” particles:
Suspension
Colloid
Emulsion
Mayonnaise
Suspension
The mixing of sand and water results in …
a colloid
a homogeneous solution
a suspension
an emulsion
a suspension
What is the molarity of 2 mol solute dissolved in 500 mL solvent?
2 M
0.5 M
2.5 M
4 M
4 M
What is the saturation point of sodium nitrate at Standard Conditions (298K)? (There is a picture of graph that I have on my phone for this question.)
92g per 100g
40g per 100g
70g per 100g
5g per 100g
92g per 100g
A suspension with medium-sized, non-settling particles:
Colloid
Solution
Colligation
Homogeneous
Colloid
Which has a greater colligative effect? (Assume each dissolves and dissociates completely.)
1 mol NaC2H3O2
1 mol KNO3
1 mol CaCl2
1 mol NaCl
1 mol CaCl2 (because it has three ions, while the others only have 2)
The strongest electrolyte:
Would always be the most soluble in water
Would have the least conductivity per mol
Would dissociate the most in water
Would be the most nonpolar
Would dissociate the most in water
The depression of freezing point based on addition of solute is a:
Colligative property
Property of water
Cohesive tendency
Abomination of nature
Colligative property
How many moles are present in a saturated solution of HCl at Standard Conditions (298K)? (Picture of graph on my phone)
1.892 mol
2520 mol
0.514 mol
1.2 mol
1.892 ml
One major difference between colloids and suspensions is:
Colloids have smaller particles
Colloids have larger particles
Colloids are non-uniform
Colloids will settle over time
Colloids have smaller particles
The solubility of a solute depends …
only on the temperature of the solvent.
only on the nature of the solute.
on the nature of the solute and the temp of the solvent
none of the above
on the nature of the solute and the temp of the solvent
Decreasing the temperature _________ the solubility of a gas in a liquid.
increases
decreases
does not affect
increases
True or False: Dissolving is a synonym for dissociating.
True
False
False
A weak electrolyte …
is very dilute.
cannot conduct electricity when dissolved in water.
only partially dissociates when dissolved.
example would be sugar.
only partially dissociates when dissolved.
Two mL of water are added to 48 mL of alcohol. What is the term for the alcohol?
solvent
solute
solution
solvent (because there is more alcohol than water)
A supersaturated solution …
-has the exact amt of solute that should dissolve @ a given T
-must have a strong electrolyte as its main component
-has more solute dissolved than it should at a given temp
-has excess solute that will never dissolve
has more solute dissolved than it should at a given temp
Dissolving a nonvolatile solute in a solvent has what effect?
Boiling Point Elevation
Vapor Pressure Lowering
Freezing Point Depression
All of the Above
All of the above
To keep a fat mixed in water one would use a(n) …
emulsifier
hot plate
blender
indicator
emulsifier
What is another name for the dissolving process?
salutation
salvation
solvation
saturation
solvation
The property of a solute that describes its ability to dissolve in a solvent.
solubility
dissociation
solidarity
decomposition
solubility
Which pair are opposites?
dilute/concentrated
weak/dilute
concentrated/strong
strong/dilute
dilute/concentrated
