Acids / Bases + Solutions Question Preview (ID: 1968)
Acids / Bases Review.
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Which of the following is an observable property of many acids?
a) They become slippery when reacting with water.
b) They react with metals to release hydrogen gas.
c) They produce salts when mixed with other acids.
d) They become more acidic when mixed with a base.
Equal volumes of 1 M HCl and NaOH are mixed. After mixing, the solution will be
a) strongly acidic
b) weakly acidic
c) nearly neutral
d) weakly basic
Potassium hydroxide (KOH) is a strong base because it
a) easily releases hydroxide ions
b) does not dissolve in water
c) reacts to form salt crystals in water
d) does not conduct an electric current
Of four different laboratory solutions, the solution with the highest acidity has a pH of
a) 11
b) 7
c) 5
d) 3
The products of a neutralization reaction are always
a) a cations and an anion
b) an acid and a base
c) water and a salt
d) solute and solvent
A teaspoon of dry coffee crystals dissolves in hot water to make coffee. The crystals are classified as a
a) solute
b) solvent
c) reactant
d) product
Which of the examples above illustrates a nonpolar solute in a polar solvent
a) NH4Cl4 in water
b) C10H10 in water
c) C2H5OH in hexane
d) CO(NH2)2 in hexane
Which of these is an example of an exothermic chemical process?
a) evaporation of water
b) melting ice
c) photosynthesis of glucose
d) combustion of gasoline
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) water at zero degrees Celsius is colder than liquid nitrogen and freezes
b) the nitrogen boils and then cools to form a solid at the opening of the container.
c) water trapped in the liquid nitrogen escapes and freezes.
d) the water vapor in the air over the opening of the liquid nitrogen freezes out
Which of the following substances is not an acid
a) HCl
b) NaNO3
c) C6H12O6
d) (NH4)2SO4
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