Intro to Chemistry Review - Solutions Review.ppt by hcj

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									Solutions Review
1. 14 grams of lithium hydroxide (LiOH) is
dissolved in water to produce 800 mL of
solution. What is the molarity of this solution?

a)0.73 M
b)0.018 M
c)17.5 M
d)2.14 M
2. Which description best defines a solute?

a)A homogenous mixture
b)A substance that gets dissolved
c)A substance that another chemical is dissolved
into
d)The amount of a substance that can be
dissolved
3. Which of the following will increase the rate
at which a substance dissolves?

a)Lowering the temperature
b)Increasing the size of solute particles
c)Increasing the surface area of the solute
d)None of the above
4. Which of the following compounds would have
the greatest affect on the freezing point of a
substance?

a)BeF2
b)NaBr
c)C5H12
d)LiOH
5. How many grams of sodium sulfate (Na2SO4)
are dissolved in 500 mL of a 1 M solution?

a)0.5 g
b)3.5 g
c)142 g
d)71 g
6. 10 grams of cesium chloride are dissolved in
ethanol to form a solution. In this example, the
ethanol is best classified as a…

a)alloy.
b)solvent.
c)solute.
d)saturated solution.
7. Water is a polar solvent, while hexane is a
nonpolar solvent. Which of the examples below
illustrates a nonpolar solute in a polar solvent?




a) NH4Cl in water        b) C10H8 in water
c) C2H5OH in hexane      d) CO(NH2)2 in hexane
8. 16 grams of calcium carbonate (CaCO3) are
dissolved in 800 mL of water. What is the
concentration in grams/Liter?

a)20 g/L
b)0.02 g/L
c)50 g/L
d)12.8 g/L
9. Which of the following best explains why a
substance dissolves?

a)Dissolving occurs due to the random motion
of solute particles and their attraction to other
solute particles.
b)Dissolving occurs due to the random motion
of solvent particles and their attraction to the
solute particles.
c)Dissolving occurs due to the random motion of
solvent particles and their attraction to other
solvent particles.
10. Which separation process is correctly
matched with the property that allows the
process to work?

a)Chromatography; density
b)Chromatography; solubility
c)Distillation; polarity
d)Distillation; boiling point

								
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