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Acids / Bases + Solutions
Test Description: Acids / Bases Review
Instructions: Answer all questions to get your test result.
1) Which of the following is an observable property of many acids?
A
They become more acidic when mixed with a base.
B
They become slippery when reacting with water.
C
They produce salts when mixed with other acids.
D
They react with metals to release hydrogen gas.
2) Equal volumes of 1 M HCl and NaOH are mixed. After mixing, the solution will be
A
weakly basic
B
nearly neutral
C
strongly acidic
D
weakly acidic
3) Potassium hydroxide (KOH) is a strong base because it
A
easily releases hydroxide ions
B
does not conduct an electric current
C
does not dissolve in water
D
reacts to form salt crystals in water
4) Of four different laboratory solutions, the solution with the highest acidity has a pH of
A
3
B
7
C
11
D
5
5) The products of a neutralization reaction are always
A
an acid and a base
B
water and a salt
C
a cations and an anion
D
solute and solvent
6) A teaspoon of dry coffee crystals dissolves in hot water to make coffee. The crystals are classified as a
A
product
B
solute
C
solvent
D
reactant
7) Which of the examples above illustrates a nonpolar solute in a polar solvent
A
NH4Cl4 in water
B
C2H5OH in hexane
C
CO(NH2)2 in hexane
D
C10H10 in water
8) Which of these is an example of an exothermic chemical process?
A
photosynthesis of glucose
B
combustion of gasoline
C
melting ice
D
evaporation of water
9) The boiling point of liquid nitrogen is 77 K. Ice forms at the opening of a container of liquid nitrogen. The best explanation for this observation is
A
the water vapor in the air over the opening of the liquid nitrogen freezes out
B
water trapped in the liquid nitrogen escapes and freezes.
C
water at zero degrees Celsius is colder than liquid nitrogen and freezes
D
the nitrogen boils and then cools to form a solid at the opening of the container.
10) Which of the following substances is not an acid
A
NaNO3
B
HCl
C
C6H12O6
D
(NH4)2SO4
*select an answer for all questions
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