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PS Ch 8 Solutions 2/4
Test Description: .
Instructions: Answer all questions to get your test result.
1) A heterogeneous mixture is one that is not
A
edible
B
made of two or more liquids
C
uniform throughout
D
easily mixed together
2) The particles in a colloid remain dispersed throughout the mixture because they
A
are different sizes
B
are very small
C
have a positive charge
D
have a negative charge
3) You can skim the fat off the top of a kettle of cold soup because fat is
A
less dense than water
B
made of large particles that will not pass through a filter
C
an emulsion that remains dispersed throughout the soup
D
made of small particles
4) Distillation can be used to separate solution of miscilble liquids because
A
different liquids have different boiling points
B
denser liquids sink to the bottom
C
boiling breaks the chemical bonds within each liquid
D
solids remain after the liquids are boiled away
5) What determines whether a mixture is a suspension of a colloid
A
None of the answers are correct
B
size of particles
C
number of particles
D
distribution of particles
6) Molarity is the concentration of a solution expressed as
A
moles of solvent per liter of solution
B
moles of solute per 100 g of solution
C
moles of solvent per 100 g of solution
D
moles of solute per liter of solution
7) Loose sugar dissolves much fater tha a sugar cube because loose sugar
A
has a higher temperature
B
has less kinetic energy
C
has a greater surface area
D
has greater surface tension
8) An unsaturated solution is one that
A
can dissolve more solute only if the pressure is increased
B
can dissolve more solute at the current conditions
C
will precipitate out all its dissolved solute
D
can dissolve more solute only if heated
9) Which states of matter can form solutions
A
solid / solid
B
gas / liquid
C
solid / liquid
D
all of the answers are correct
10) When a solution holds more dissolved solute than is needed to reach equilibrium at a given temperature, the solution is
A
supersaturated
B
distilled
C
saturated
D
condensed
*select an answer for all questions
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