Biochem Module 2 Exam Questions & Answers (Grade A+).docx

Biochem Module 2 Exam Questions &
Answers (Grade A+)
The pH of a solution of 0.0010 M NaOH is:


1
11
8
0
14 -
correct answer ✅11 [Kw=[H+ ][OH- ] = 1.0 x 10-14; [H+ ][0.0010] =
1.0 x 10-14 [H+ ]=1.0 x 10-11; pH=-log[1.0 x 10-11;]=11]


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 -
correct answer ✅- All of the answers are correct

, Biochem Module 2 Exam Questions &
Answers (Grade A+)
The bent shape of water is due to ______________.


- The dipole arrows in a water molecule - - The electronegativity
difference between hydrogen and oxygen
- The unequal electron sharing between hydrogen and oxygen
- The unshared electron pairs on the oxygen atom
- None of the answers are correct -
correct answer ✅- The unshared electron pairs on the oxygen
atom


The H+ concentration of a solution is 1.2 x 10-3 M. What is the pH?


-1.20
1.20
3.12
-2.92
2.92 -
correct answer ✅2.92


If the Ka of an acid is 5.63 x 10-3, what is the pKa?