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Water, pH and Macromolecules

Water, pH and Macromolecules
The reason that fats contain more energy than simple sugars, is fats have many more

carbon atoms
covalent bonds
hydrogen bonds
hydrogen atoms

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Water, pH and Macromolecules
The dissociation constant of H2O at 25° C is

10-14 M
10-7 M
1014 M
107 M

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Water, pH and Macromolecules
The lone pair electrons on oxygen in a H20 molecule

carry a partial negative charge
carry a partial positive charge
form covalent bonds in ice
are not important for the properties of water

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Water, pH and Macromolecules
Molecules in which the atoms are held together by __________ bonds have the strongest chemical linkages.

hydrogen
covalent
ionic
noncovalent

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

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

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Water, pH and Macromolecules
A compound that is capable of forming hydrogen bonds with water

does not dissolve well in water
should act as a good buffer for acids and bases
contains at least some polar covalent bonds
is probably held together by noncovalent bonds

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