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WorksheetsChapter 2 Properties of Water
Total questions: 15
Worksheet time: 37mins
Name
Class
Date
1.
Why is a water molecule polar?
a)
because there is an uneven distributions of electrons between the oxygen and hydrogen atoms
b)
because water is one of the few compounds found in a liquid state
c)
because water is neutral
2.
How does the structure of water contribute to its unique properties?
a)
water is neutral and does not have any properties
b)
water molecules produce a force called "surface tension"
c)
the positive charges of its 10 protons balance out the negative charges of its 10 electrons
3.
This bond is known as the attraction between a hydrogen atom with a positive charge and another atom with a partial negative charge.
a)
hydrogen bond
b)
ionic bond
c)
covalent bond
4.
What is a "surface tension" force?
a)
an attraction between molecules of different substances
b)
the strong cohesion between water molecules that produces a force which can support very lightweight objects
c)
a force that is responsible for the capillary action causing water in columns to rise
5.
Name a result of multiple hydrogen bonds between water molecules that takes a large amount of heat energy to cause molecules to move faster, which raises the temperature of the water.
a)
solutions
b)
adhesion
c)
heat capacity
6.
This attraction occurs between molecules of different substances.
a)
an attraction
b)
cohesion
c)
adhesion
7.
A mixture is known as
a)
ions that gradually become dispersed.
b)
a material composed of two or more elements or compounds that are physically mixed together.
c)
a material composed of two or more elements or compounds that are physically mixed together but not chemically combined.
8.
Suspensions generally occur when
a)
some materials do not dissolve when placed in water but separate into pieces so small that they do not settle out.
b)
some materials do dissolve when placed in water
c)
some materials always dissolve when placed in water and separate into large pieces, changing its form and properties.
9.
The pH Scale is
a)
a devised measurement system that can help molecules split apart to form ions.
b)
a devised measurement system that can help form high concentrations of H+ ions.
c)
a devised measurement system that can indicate the concentration of H+ ions in a solution.
10.
A compound that is known to produce hydrogen (OH-) in solutions is called a
a)
base
b)
acid
c)
buffer
11.
The concentration of H+ ions determines
a)
whether solutions are bases.
b)
whether solutions are acidic or basic.
c)
whether solutions are cohesion or adhesion substances.
12.
Buffers are known as
a)
weak acids or bases that can react with strong acids or bases to prevent sharp, sudden changes in pH.
b)
any compound that produces hydroxide.
c)
strong acids or bases that can react with other strong acids or bases to cause sharp, sudden changes in pH.
13.
In a solution, the substance that is dissolved is known as the
a)
mixture
b)
solute
c)
solvent
14.
In a solution, the substance in which the solute dissolves is known as the
a)
solvent
b)
mixture
c)
element
15.
When an ionic compound such as sodium chloride is placed in water, what can occur?
a)
water molecules surround and combine electrons and neutrons.
b)
water molecules surround and separate the positive and negative ions.
c)
water molecules remain in its original state or form.
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