PORTAGE LEARNING CHEM 210 - MODULE 2 EXAM

PORTAGE LEARNING CHEM 210 - MODULE 2 EXAM
2025
Question 1


pts

What factor contributes to the bent shape of a water molecule?
The dipole arrows in a water molecule
The unshared electron pairs on the oxygen atom
The electronegativity difference between hydrogen and oxygen
The unequal electron sharing between hydrogen
and oxygen None of the answers are correct
THE UNSHARED ELECTRON PAIRS ON THE OXYGEN ATOM
Question 4
pts

Which diagrams correctly represent a hydrogen bond?




A and B
A and D
B and C
C and D
A and C
A AND C

, BOTH SHOW A PROTON DONOR AND ACCEPTOR
pts

Scientific Calculator

The pH of a solution of 8.9 x 10-12 M NaOH is: A. 8.9
B. 8.9 x 10-12
C. 4.8
D. 11
E. 2.9
E

[Kw=[H+][OH-] = 1.0 x 10-14; [H+][8.9 x 10-12] = 1.0 x 10-14 ;[H+]=890; pH=-
log[890]=2.9]

Question 2
pts

Water is a unique molecule. Which of the following contributes to water’s
unique place in the chemical world?
The geometry of the molecule
The polarity of the O-H bonds
The ability of water molecules to hydrogen bond
The bond angle of water
All of the answers are correct
ALL OF THE ANSWERS ARE CORRECT

Question 5
pts

Scientific Calculator

The H+ concentration of a solution is 5.6 x 10-5 What is the pH?
-4.25
4.25
5.65
-9.75
9.75
4.25