Chem 210 Exam 2
1. The pH of a solution of 0.0010 M NaOH is:
A. 1
B. 11
C. 8
D. 0
E. 14
2. Water is a unique molecule which of the following contributes to water’s unique
place in 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 answers are correct
3. The bent shape of water is due to
- The dipole arrows in a water molecule
- The electronegativity different 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
4. Which diagram correctly represents a hydrogen bond
- A and D
- A and C
- C and D
- B and D
5. 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
6. If the Ka of an acid is 5.63 X 10-3, what is the pKa?
- 6.86
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, - 2.25
- 5.63
- 10.12
- 1.38
7. 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)
- Nitrous acid, acetic acid, phosphoric acid
- Acetic acid, nitrous acid, phosphoric acid. Correct!
- Phosphoric acid, nitrous acid, acetic acid Acetic acid, phosphoric acid, nitrous acid
- None of the above
8. Elemental iodine is a solid at room temperature. What is the dominant attractive
force that exists between I2 molecules in the solid?
- London forces
- Hydrogen bonds
- Halogen forces
- Dipole- dipole forces
- Covalent bonds
9. Which one of the following molecules can form a hydrogen bond?
- HBr
- HCl
- NH3
- CH4
- H2
10. A hydrogen bond can form between a hydrogen atom bonded to oxygen, O-H and
- C
This study source was downloaded by 100000820363976 from CourseHero.com on 04-05-2022 03:33:04 GMT -05:00
https://www.coursehero.com/file/134709707/Exam-2docx/
1. The pH of a solution of 0.0010 M NaOH is:
A. 1
B. 11
C. 8
D. 0
E. 14
2. Water is a unique molecule which of the following contributes to water’s unique
place in 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 answers are correct
3. The bent shape of water is due to
- The dipole arrows in a water molecule
- The electronegativity different 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
4. Which diagram correctly represents a hydrogen bond
- A and D
- A and C
- C and D
- B and D
5. 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
6. If the Ka of an acid is 5.63 X 10-3, what is the pKa?
- 6.86
This study source was downloaded by 100000820363976 from CourseHero.com on 04-05-2022 03:33:03 GMT -05:00
https://www.coursehero.com/file/134709707/Exam-2docx/
, - 2.25
- 5.63
- 10.12
- 1.38
7. 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)
- Nitrous acid, acetic acid, phosphoric acid
- Acetic acid, nitrous acid, phosphoric acid. Correct!
- Phosphoric acid, nitrous acid, acetic acid Acetic acid, phosphoric acid, nitrous acid
- None of the above
8. Elemental iodine is a solid at room temperature. What is the dominant attractive
force that exists between I2 molecules in the solid?
- London forces
- Hydrogen bonds
- Halogen forces
- Dipole- dipole forces
- Covalent bonds
9. Which one of the following molecules can form a hydrogen bond?
- HBr
- HCl
- NH3
- CH4
- H2
10. A hydrogen bond can form between a hydrogen atom bonded to oxygen, O-H and
- C
This study source was downloaded by 100000820363976 from CourseHero.com on 04-05-2022 03:33:04 GMT -05:00
https://www.coursehero.com/file/134709707/Exam-2docx/
