test 1 review

what are the intermolecular interactions that are strengthened by the presence of WATER?

• Hydrophobic and Van der Waals

• Hydrophobic and Peptide bonds

• Peptide and Van der Waals

• Peptide bonds and Polar

Which acid could be used to buffer a solution that has a pH of 2.3

• 6.8

• 4.3

• 1.0

• 1.4

True or False: Like dissolves like is a good rule of thumb to predict the solubility of substances.

• True

• False

The lower the boiling point, the ___ the intermolecular forces.

• stronger
• weaker

Molecule A has a pka of 8 and Molecule B has a pka of 18. Which will be deprotonated first?

• Molecule A

• Molecule B

The answer choices show different acids with their pka values. Which is the WEAKEST acid out of the choices below?

• pka 11

• pka 2

• pka 4

• pka 6

If the buffer of a solution has a pka of 5.56, what species dominates at a pH of 5.56.

• base

• acid

• neither

At a pH of 6.0, which amino acid is negatively charged?

• Glu

• Arg

• Lys

• Ala

At a pH of 4.5, which amino acid is negatively charged?

• N

• A

• D

• H

Which amino acid has an aromatic ring

• P

• V

• R

• W