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Properties of Water/pH/Chem

Total questions: 54

Worksheet time: 1hrs 5mins

Name
Class
Date
1.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
2.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
3.
Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
4.
Why does ice float?
a)
As water freezes, it expands and its density decreases.
b)
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
c)
As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
d)
As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
5.
Which end of the water molecule has a slightly positive charge?
a)
the oxygen end
b)
the hydrogen end
c)
both ends are slightly positive
d)
neither end is positive
6.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
7.
Which of the following is LEAST likely to dissolve in water?
a)
nonpolar fats and oils
b)
polar sugar molecules
c)
salt made of a positive sodium ion and a negative chloride ion
d)
all of the substances will dissolve easily in water
8.
Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?
a)
Water is an acid.
b)
Water is a versatile solvent.
c)
Water has a high heat capacity.
d)
 Water acts as a buffer.
9.
 Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?
a)
The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together
b)
The insects actually use their wings to hover slightly above the water's surface and they only skim it with their feet
c)
The insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface
d)
The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
10.
The fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid form
a)
less polar
b)
more polar
c)
less dense
d)
more dense
11.
The tightness across the surface of water that enables paper clips to float is ____________.
a)
adhesion
b)
capillary action
c)
surface tension
d)
polarity
12.
Which statement explains why water molecules stick together?
a)
both sides are negative
b)
one side has a positive charge and the other side has a negative charge
c)
one side has a negative charge adn the other side has a neutral charge
d)
both sides are positive
13.
When a molecule has an opposite electrical charge on each end, it is known as what?
a)
cohesion
b)
polar molecule
c)
hydrogen bond
d)
solution
14.
When water molecules stick easily to other water molecules, this is called what?
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
15.

The ability of water molecules to stick to each other, creating surface tension is called:

a)

Cohesion

b)

Adhesion

c)

Insulation

d)

Ph

16.

The fact that water can stick to other substances is called:

a)

Ph

b)

Adhesion

c)

Cohesion

d)

Insulation

17.

What is the chemical symbol of water?

a)

H2O

b)

CO2

c)

O2

d)

N2

18.

What is cohesion?

a)

The ability of a molecule to "stick" to itself

b)

The ability of a molecule to "stick" to other molecules

c)

Large amounts of energy are required to change the temperature of a substance

d)

A well-organized and efficient team

19.

What characteristic is shown in the image?

a)

Polarity

b)

Hydrogen Bonds

c)

Cohesion

d)

Adhesion

20.

This individual is ice fishing. They cut through the top layers of ice to reach the water and fish below. What property of water allows for this to happen?

a)

Expansion Upon Freezing

b)

Universal Solvent

c)

Ability to Moderate Temperature

d)

Cohesive Behavior

21.

What property of water causes these Alka-Seltzer tablets to dissolve?

a)

Universal Solvent

b)

Expansion Upon Freezing

c)

Cohesive Behavior

d)

High Specific Heat

22.

Blood functions as a transport mechanism to take nutrients and oxygen to all cells in the body. What property of water allows for this to occur?

a)

Expansion Upon Freezing

b)

Universal Solvent

c)

Cohesive Behavior

d)

Ability to Moderate Temperature

23.

What is the movement of water within the spaces of a porous material due to the forces of adhesion, cohesion, and surface tension

a)

Malleability

b)

Conductivity

c)

Freezing Point

d)

Capillary Action

24.

What water phenomenon can be observed in this photo?

a)

Water dissolving

b)

Capillary Action

c)

Chemical Reaction

d)

Photosynthesis

25.

Which TWO water properties can be observed in this picture?

a)

Capillary Action

b)

Cohesion

c)

Adhesion

d)

Freezing

26.

How is this lizard able to run across water?

a)

Capillary Action

b)

The lizard is really light

c)

The water is a little frozen

d)

Surface Tension

27.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
28.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
29.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
30.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
31.
Which solution releases H+ in solution?
a)
Base
b)
Acid
c)
Buffer
d)
Water
32.
This substance releases OH- into solution
a)
Acid
b)
Base
c)
Neutral
33.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
34.
A solution with a pH of 8.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
35.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
36.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
37.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
38.

A base is a substance

a)

That releases OH- ions when dissolved in water

b)

That releases H+ ions when dissolved in water

c)

Does not release any ions when dissolved in water

d)

None of the above

39.

An acid’s pH is between :

a)

0 to 6

b)

7

c)

8-14

d)

6-14

40.

An alkaline material will have a pH of

a)

<7

b)

>7

c)

=7

41.

An acidic material will have a pH of

a)

<7

b)

>7

c)

=7

42.

If a material has more OH- ions, then it is a(n)

a)

Acid

b)

Alkaline

c)

Neutral

43.

What is the atomic number?

a)

the number of protons

b)

the number of protons and neutrons

c)

the number of neutrons

d)

the number of atoms

44.
What is the mass number defined as?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
45.

The fluorine atom has an atomic number of

a)

19

b)

9

46.
Which particle has a positive charge?
a)
electron
b)
orbital
c)
proton
d)
neutron
47.

Which subatomic particle has a negative charge in the atom?

a)

proton

b)

neutron

c)

electron

d)

quark

48.
What is the formula to solve for the neutron?
a)
Mass + Atomic Number= Neutrons
b)
Mass x Atomic Number = Neutrons
c)
Mass - Atomic Number = Neutrons
d)
Mass + Number of Protons = Neutron
49.
How many neutrons does oxygen have?
a)
16
b)
15.99
c)
8
d)
Doesn't contain any neutrons
50.

What is the atomic mass for nickel?

a)

58.693

b)

28

c)

30.693

d)

86.693

51.

What is the atomic number for boron?

a)

15.811

b)

5

c)

5.811

d)

10.811

52.

How many protons are in an atom of manganese?

a)

50

b)

54.938

c)

25

d)

109.876

53.

How many electrons are in an atom of strontium?

a)

125.62

b)

87.62

c)

49.62

d)

38

54.

How many neutrons are in an atom of zirconium?

a)

51.224

b)

131.224

c)

40

d)

80

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