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Worksheetssolutions review
Total questions: 20
Worksheet time: 21mins
Name
Class
Date
1.
Which of the following is a heterogeneous mixture
a)
water
b)
Salt dissolved in water
c)
chex mix
d)
air
2.
Which of the following does not increase the rate of dissolving a solid in a liquid?
a)
stirring the solution
b)
crushing up the solute
c)
raising the temperature of the water
d)
lowering the temperature of the water
3.
Why will sugar dissolve in water?
a)
sugar is ionic
b)
sugar has a similar polarity to water
c)
sugar will not dissolve in water
d)
sugar has similar energy to water
4.
Calculate the molarity of a solution prepared by dissolving 78.2 grams of CaCl2 in 500.0mls of water
a)
0.156 M
b)
0.709 M
c)
0.353 M
d)
1.41 M
5.
How many grams of ammonium chloride are needed to make a saturated solution at 80o C?
a)
50 grams
b)
80 grams
c)
65 grams
d)
75 grams
6.
At 40oC which salt is least soluble?
a)
KClO3
b)
NaCl
c)
KI
d)
KNO3
7.
What kind of solution is made from 50 grams of KNO3 at 40oC?
a)
saturated
b)
unsaturated
c)
supersaturated
8.
Which will dissolve the slowest
a)
powdered sugar in hot water
b)
Powdered sugar in cold water
c)
sugar cubes in hot water
d)
sugar cubes in cold water
9.
Which of the following solutions made from one mole of the following solutes in 100.0 mls of water has the lowest freezing point?
a)
MgBr2
b)
Al2(CO3)3
c)
NH4C2H3O2
d)
N2O4
10.
A metal solution is a(n)
a)
colloid
b)
suspension
c)
alloy
d)
heterogeneous mixture
11.
As the pressure decreases the solubility of a gas in a liquid
a)
increases
b)
decreases
12.
What mass of NaCl is needed to prepare 850 mls of 6.0 M NaCl solution?
a)
5.1 grams
b)
0.087 grams
c)
87 grams
d)
298 grams
13.
Which of the following has components in a uniform arrangement?
a)
Heterogeneous mixture
b)
Colloids
c)
Suspensions
d)
Solutions
14.
What is the molarity of 420 mls of a KCl solution that contains 16.0 grams of KCl
a)
625 M
b)
0.51 M
c)
3.19 M
d)
0.00563 M
15.
How much of the 12.0 M stock solution do you need to prepare 250 mls of .20M HCl?
a)
15,000 mls
b)
4.17 mls
c)
9.6 mls
d)
0.0096 mls
16.
Which of these is a colloid?
a)
paint
b)
salt water
c)
air
d)
gasoline
17.
If the amount of solute present in a solution is more than the maximum than can be dissolved, the solution is
a)
saturated
b)
unsaturated
c)
supersaturated
d)
colloidal
18.
The colloidal particles in the a colloid form the
a)
dispersed phase
b)
dispersion medium
c)
solute
d)
solvent
19.
The Tyndall effect is used to distinguish between
a)
gases and solids
b)
solutions and colloids
c)
solvent and suspensions
d)
all of these
20.
Which of the following will produce crystals if disturbed?
a)
saturated solutions
b)
colloids
c)
supersaturated solutions
d)
unsaturated solutions
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