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WorksheetsSolubility Curves
Total questions: 27
Worksheet time: 1hrs 4mins
Name
Class
Date
1.
At approximately what temperature does the solubility of sodium chloride, NaCl, match the solubility of potassium dichromate, K2Cr2O7?
a)
60 ºC
b)
30 ºC
c)
50 ºC
d)
83 ºC
2.
How many grams of K2Cr2O7, are soluble in 100 g of water at 95 ºC?
a)
83 grams
b)
75 grams
c)
40 grams
d)
12 grams
3.
Which substance is MOST soluble at 0 ºC?
a)
KI
b)
NaNO3
c)
NaCl
d)
Ce2(SO4)3
4.
Which solute is the most soluble at 10 ⁰C?
a)
KI
b)
KClO3
c)
NH4Cl
d)
NH3
5.
Which of these solutes does not increase in solubility as temperature rises?
a)
NH3
b)
NaNO3
c)
KNO3
d)
NaCl
6.
Which solute is the least soluble at 90 ⁰C?
a)
SO2
b)
KClO3
c)
KI
d)
HCl
7.
When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
8.
When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:
a)
supersaturated
b)
unsaturated
c)
saturated
9.
When 42 grams of potassium chloride, is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
10.
Rate of dissolving can be increased by:
a)
Agitation or mixing the substance.
b)
Increasing temperature.
c)
Increasing surface area.
d)
All of the above.
11.
Which solute is MOST likely a gas?
a)
KNO3
b)
NaNO3
c)
KCl
d)
Ce2(SO4)3
12.
At what temperature can you fully dissolve 140g of NaNO3?
a)
62
b)
73
c)
81
d)
You cannot determine this
13.
At what temperature can you fully dissolve 60g of KNO3?
a)
27
b)
30
c)
37
d)
You cannot determine this
14.
What type of a solution is 25g NaCl at 70ºC in 100g H2O?
a)
Saturated
b)
Unsaturated
c)
Supersaturated
15.
__________ are made up of solutes and solvents.
a)
Solutions
b)
Suspensions
c)
Heterogeneous Mixtures
d)
Pure Substances
16.
The amount of solute actually dissolved in a given amount of solvent.
a)
dilution
b)
concentration
c)
saturated solution
d)
supersaturated mixture
17.
When a solvent contains as much of the solute as it can hold, the solution is said to be
a)
supersaturated
b)
diluted
c)
saturated
d)
unsaturated
18.
Consider the salts represented on the solubility curves displayed as line graphs. In all cases the salts are which part of an aqueous solution?
a)
precipitate
b)
solvent
c)
solute
d)
concentrate
19.
The substance that dissolves the solute.
a)
Solution
b)
Solute
c)
Concentration
d)
Solvent
20.
The substance being dissolved.
a)
Solute
b)
Solvent
c)
Solution
d)
Concentration
21.
When a substance can dissolve in another substance, it is said to be..
a)
soluble
b)
insoluble
c)
miscible
d)
immiscible
22.
How does a solution become supersaturated?
a)
dissolve lots of solvent in it.
b)
dissolve a little solute in it.
c)
dissolve more solute than you should be able to.
d)
dissolve a super amount of solvent in it.
23.
Identify a method to DECREASE the dissolving rate of a solution:
a)
decrease the temperature
b)
add Kinetic Energy
c)
stir the solution
d)
increase the temperature
24.
A solution of potassium chlorate, KClO3, has 20 grams of the salt dissolved in 100 grams of water at 70 ºC. Approximately how many more grams of the salt can be added to the solution before reaching the saturation point?
a)
10 grams
b)
30 grams
c)
80 grams
d)
60 grams
25.
A beaker containing 80 grams of lead(II) nitrate, Pb(NO3)2, in 100 grams of water has a temperature of 30 ºC. Approximately how many grams of the salt are undissolved, on the bottom of the beaker?
a)
20 grams
b)
80 grams
c)
66 grams
d)
14 grams
26.
A solution is.......
a)
a heterogeneous mixture
b)
a homogeneous mixture
c)
a pure substance
d)
a compound
27.
The part of a soultion that is in the greatest amount is....
a)
never the solvent
b)
always the solvent
c)
the solute and solvent will be in equal amounts
d)
always the solute
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