Biochem Module 2 Set questions and answers
2024\2025 A+ Grade
What is the shape of water?
- correct answer Bent. The bond angle is 104.5 degrees.
What is autoionization, and how is it important for water?
- correct answer Autoionization is the ability of a compound to react with itself to form ions. One water
molecule reacts with a second molecule to form two ions: H3O+ and OH-. These ions exist in small
amounts in pure water and influence the chemistry of water.
Name the three non-covalent forces discussed in this module
- correct answer 1. Dipole-dipole forces, 2. Hydrogen bonding, and 3. London dispersion forces
What type of non-covalent interaction is known as the strongest dipole-dipole force?
- correct answer .hydrogen bonds.
Would the following be a hydrogen donor or acceptor? Or both?
- correct answer .Only a hydrogen acceptor due to the electrons on the oxygen. It is not a hydrogen
donor because the electrons are bonded to a carbon.
How does the strength of London forces change with increasing molecular weight? Explain briefly.
- correct answer As molecular weight increase, the strength of London forces also increase. This is due
to the increased number of electrons in larger molecules. The larger number of electrons creates the
potential of stronger temporary dipoles.
Calculate the pH of solution containing 0.12 M of OH-.
- correct answer pH = 13.08
If a solution contains 0.00023M of H+, then what is the OH- concentration?
- correct answer 4.35 X 10-11 M OH-
2024\2025 A+ Grade
What is the shape of water?
- correct answer Bent. The bond angle is 104.5 degrees.
What is autoionization, and how is it important for water?
- correct answer Autoionization is the ability of a compound to react with itself to form ions. One water
molecule reacts with a second molecule to form two ions: H3O+ and OH-. These ions exist in small
amounts in pure water and influence the chemistry of water.
Name the three non-covalent forces discussed in this module
- correct answer 1. Dipole-dipole forces, 2. Hydrogen bonding, and 3. London dispersion forces
What type of non-covalent interaction is known as the strongest dipole-dipole force?
- correct answer .hydrogen bonds.
Would the following be a hydrogen donor or acceptor? Or both?
- correct answer .Only a hydrogen acceptor due to the electrons on the oxygen. It is not a hydrogen
donor because the electrons are bonded to a carbon.
How does the strength of London forces change with increasing molecular weight? Explain briefly.
- correct answer As molecular weight increase, the strength of London forces also increase. This is due
to the increased number of electrons in larger molecules. The larger number of electrons creates the
potential of stronger temporary dipoles.
Calculate the pH of solution containing 0.12 M of OH-.
- correct answer pH = 13.08
If a solution contains 0.00023M of H+, then what is the OH- concentration?
- correct answer 4.35 X 10-11 M OH-
