Portage Learning- Biochemistry Module
2 with 82 complete solutions 2025
Portage Learning- Biochemistry Module
2 with 82 complete solutions 2025
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] -
ANSWER *The pH of a solution of 0.0010 M NaOH is:
A. 1
B. 11
C. 8
D. 0
E. 14
E. - ANSWER *Water is a unique molecule. Which of the following contributes to water's unique place in
the chemical world?
A. The geometry of the molecule
B. The polarity of the O-H bonds
C. The ability of water molecules to hydrogen bond
D. The bond angle of water
E. All of the answers are correct
D - ANSWER *The bent shape of water is due to ______________.
A. The dipole arrows in a water molecule
B. The electronegativity difference between hydrogen and oxygen
C. The unequal electron sharing between hydrogen and oxygen
D. The unshared electron pairs on the oxygen atom
E. None of the answers are correct
A & D - ANSWER *Which diagrams correctly represent a hydrogen bond?
,Portage Learning- Biochemistry Module
2 with 82 complete solutions 2025
2.92 - ANSWER *The H+ concentration of a solution is 1.2 x 10-3 M. What is the pH?
B. 2.25
[pKa = -log(5.63 x 10-3) = 2.25] - ANSWER *If the Ka of an acid is 5.63 x 10-3, what is the pKa?
A. 6.86
B. 2.25
C. 5.63
D. 10.12
E. 1.38
C. Phosphoric acid, nitrous acid, acetic acid - ANSWER *List the acids in DECREASING order of strength
(strongest to weakest):
Nitrous acid (Ka = 4.0 x 10-4)
acetic acid (Ka = 1.7 x 10-5)
phosphoric acid (Ka = 7.3 x 10-3)
A. Nitrous acid, acetic acid, phosphoric acid
B. Acetic acid, nitrous acid, phosphoric acid
C. Phosphoric acid, nitrous acid, acetic acid
D. Acetic acid, phosphoric acid, nitrous acid
E. None of the above
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] - ANSWER *The
pH of a solution of 8.9 x 10-12M NaOH is:
A. 8.9
, Portage Learning- Biochemistry Module
2 with 82 complete solutions 2025
B. 8.9 x 10-12
C. 4.8
D. 11
E.2.9
A. - ANSWER *Elemental iodine (I2) is a solid at room temperature. What is the dominant attractive
force that exists between I2 molecules in the solid?
A. London forces
B. Hydrogen bonds
C. Halogen forces -
D. Dipole-dipole forces
E. Covalent bonds
C. - ANSWER *Which one of the following molecules can form a hydrogen bond?
(A.) HBr
(B.) HCl
(C.) NH3
(D.) CH4
(E.) H2
A. 4.25
[[H]=5.6 x 10; pH=-log[5.6 x 10-6]=4.25] - ANSWER *The H concentration of a solution is 5.6 x 10-6
What is the pH?
A. 4.25
B. -4.25
C. 5.65
D. -9.75
2 with 82 complete solutions 2025
Portage Learning- Biochemistry Module
2 with 82 complete solutions 2025
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] -
ANSWER *The pH of a solution of 0.0010 M NaOH is:
A. 1
B. 11
C. 8
D. 0
E. 14
E. - ANSWER *Water is a unique molecule. Which of the following contributes to water's unique place in
the chemical world?
A. The geometry of the molecule
B. The polarity of the O-H bonds
C. The ability of water molecules to hydrogen bond
D. The bond angle of water
E. All of the answers are correct
D - ANSWER *The bent shape of water is due to ______________.
A. The dipole arrows in a water molecule
B. The electronegativity difference between hydrogen and oxygen
C. The unequal electron sharing between hydrogen and oxygen
D. The unshared electron pairs on the oxygen atom
E. None of the answers are correct
A & D - ANSWER *Which diagrams correctly represent a hydrogen bond?
,Portage Learning- Biochemistry Module
2 with 82 complete solutions 2025
2.92 - ANSWER *The H+ concentration of a solution is 1.2 x 10-3 M. What is the pH?
B. 2.25
[pKa = -log(5.63 x 10-3) = 2.25] - ANSWER *If the Ka of an acid is 5.63 x 10-3, what is the pKa?
A. 6.86
B. 2.25
C. 5.63
D. 10.12
E. 1.38
C. Phosphoric acid, nitrous acid, acetic acid - ANSWER *List the acids in DECREASING order of strength
(strongest to weakest):
Nitrous acid (Ka = 4.0 x 10-4)
acetic acid (Ka = 1.7 x 10-5)
phosphoric acid (Ka = 7.3 x 10-3)
A. Nitrous acid, acetic acid, phosphoric acid
B. Acetic acid, nitrous acid, phosphoric acid
C. Phosphoric acid, nitrous acid, acetic acid
D. Acetic acid, phosphoric acid, nitrous acid
E. None of the above
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] - ANSWER *The
pH of a solution of 8.9 x 10-12M NaOH is:
A. 8.9
, Portage Learning- Biochemistry Module
2 with 82 complete solutions 2025
B. 8.9 x 10-12
C. 4.8
D. 11
E.2.9
A. - ANSWER *Elemental iodine (I2) is a solid at room temperature. What is the dominant attractive
force that exists between I2 molecules in the solid?
A. London forces
B. Hydrogen bonds
C. Halogen forces -
D. Dipole-dipole forces
E. Covalent bonds
C. - ANSWER *Which one of the following molecules can form a hydrogen bond?
(A.) HBr
(B.) HCl
(C.) NH3
(D.) CH4
(E.) H2
A. 4.25
[[H]=5.6 x 10; pH=-log[5.6 x 10-6]=4.25] - ANSWER *The H concentration of a solution is 5.6 x 10-6
What is the pH?
A. 4.25
B. -4.25
C. 5.65
D. -9.75
