Activities Quiz
1.

Each water molecule is joined to _____ other water molecules by ____ bonds. (Activity 3A)

two ... hydrogen
four ... hydrogen
three ... ionic
four ... polar covalent
two ... polar covalent


2.

The unequal sharing of electrons within a water molecule makes the water molecule _____. (Activity 3A)

change easily from a liquid to gaseous form
ionic
hydrophobic
polar
have a low surface tension


3.

The tendency of an atom to pull electrons toward itself is referred to as its _____. (Activity 3A)

electronegativity
covalency
ionic potential
polarity
tonicity


4.

In this molecule, what type of bond is found between the oxygen and hydrogens? (Activity 3A)

question #4

polar covalent
hydrophobic
ionic
hydrophilic
nonpolar covalent


5.

Which of these bonds is weakest? (Activity 3A)

answer #1
answer #2
answer #3
answer #4
answer #5


6.

Why isn't this insect drowning? (Activity 3A)

 question #6

Surface tension.
The insect is very light.
It is difficult to change the temperature of water.
The insect is swimming.
The insect is flying just above the water surface.


7.

Click on the diagram to start the animation. What process is illustrated by this animation? (Activity 3B)

push
antigravity
evaporation
precipitation
gravity


8.

What name is given to this molecule? (Activity 3C)

 question #8

water
methane
hydronium ion
glucose
hydroxide ion


9.

How did this molecule form? (Activity 3C)

 question #9

Two water molecules bonded.
A water molecule gained an hydrogen ion from another water molecule.
Evaporation.
A hydrogen molecule bonded with an OH- molecule.
A water molecule split in half.


10.

What name is given to this molecule? (Activity 3C)

 question #10

water
DNA
hydronium ion
glucose
hydroxide ion


11.

Click on the diagram to begin the animation. This animation illustrates the _____ of water. (Activity 3C)

surface tension
adhesion
cohesion
specific heat
dissociation


12.

Which of these is the correct equation for the dissociation of water? (Activity 3C)

H2O + H2O <==> H3O+ + OH-
H+ <==> H2O + H2O+
H2O + H2O+ <==> H2O + OH-
H2O <==> H+ + OH-
H2O + OH- <==> H2O+


13.

What is the charge on a hydronium ion? (Activity 3C)

+1
+2
0
-1
-2


14.

What is the charge on a hydroxide ion? (Activity 3C)

+1
+2
0
-1
-2


15.

About _____ molecules in a glass of water are dissociated. (Activity 3C)

1 in 1,000,000,000
1 in 1,000,000
1 in 5,000,000
1 in 2
1in 500,000,000


16.

What is the arrow pointing to? (Activity 3D)

 question #16

water molecule
hydroxide ion
electron
hydrogen ion
hydronium ion


17.

What is the arrow pointing to? (Activity 3D)

 question #17

hydrogen ion
proton
hydroxide ion
hydronium ion
water


18.

In a neutral solution the concentration of _____. (Activity 3D)

hydrogen ions is equal to the concentration of hydroxide ions
water molecules is less than the concentration of hydrogen ions
hydrogen ions is less than the concentration of hydroxide ions
water molecules is less than the concentration of hydroxide ions
hydrogen ions is greater than the concentration of hydroxide ions


19.

How does the pH of the solution on the right compare with that of the solution on the left? (Activity 3D)

 question #19

The solution on the right is neutral relative to the solution on the left.
Both of these solutions are equally acidic.
The solution on the right is basic relative to the solution on the left.
Both of these solutions are equally basic.
The solution on the right is acidic relative to the solution on the left.



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2002 Pearson Education, Inc.,
publishing as Benjamin Cummings