Water, pH and Macromolecules
The pH of a solution is determined by

relative concentration of acids and bases
environmental effect
concentration of salt
dielectric constant of the medium

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Water, pH and Macromolecules
Which of the following character does not apply to water?

The covalent bonds in water are highly polarized
All three atoms in the water molecule readily form hydrogen bonds
The water molecule is asymmetric
The water molecule readily forms hydrophobic interactions

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Water, pH and Macromolecules
Buffer solutions

cause a decrease in pH when acids are added to them.
are rarely found in living systems
tend to maintain a relatively constant pH.
will always have a pH of 7

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Water, pH and Macromolecules
Hydrogen bonds and hydrophilic interactions are types of

weak chemical bonds that link together separate molecules
strong chemical bonds that link together separate molecules
strong chemical bonds that hold together the atoms within a molecule
weak chemical bonds that hold together the atoms within a molecule

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