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

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

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Water, pH and Macromolecules
Buffer solutions

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

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

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

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