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The pH of a solution of 0.0010 M NaOH is: 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? All of the answers are correct The bent...

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  • October 28, 2023
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  • 2023/2024
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Biochemistry M2 Exam Questions and
Answers Already Passed
The pH of a solution of 0.0010 M NaOH is:

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?

All of the answers are correct

The bent shape of water is due to ______________.

The unshared electron pairs on the oxygen atom

Which diagrams correctly represent a hydrogen bond?

A and D




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

2.92

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

2.25 ([pKa = -log(5.63 x 10-3) = 2.25])

, 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)

Phosphoric acid, nitrous acid, acetic acid

Elemental iodine (I2) is a solid at room temperature. What is the dominant attractive force that

exists between I2 molecules in the solid?

London forces

Which one of the following molecules can form a hydrogen bond? (A.) HBr (B.) HCl (C.) NH3

(D.) CH4 (E.) H2

C. NH3

A hydrogen bond can form between a hydrogen atom bonded to oxygen, O-H, and ________.

N

In a bond between P and Cl, there exists a difference in electronegativity resulting in partial

positive and partial negative charges. If a dipole arrow were added to this structure, which way

would the arrow point?

The arrow points from N toward Br

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