BioChem 210 Module 2 Exam - Portage Learning

BioChem 210 Module 2 Exam - Portage Learning

Question 1
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
A
B
C
 BioChem 210 Module 2 Exam - Portage Learning
D
Correct!
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
Which attribute contributes to water’s unusual properties?
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
Correct!
All of the answers are correct