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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

hydrogen bonds
covalent bonds
carbon atoms
hydrogen atoms

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Water, pH and Macromolecules
The strength of an acid depends on

number of double bonds
electronegativity
number of protons released
number of neutrons gain

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

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

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

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

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Water, pH and Macromolecules
A solution with pH = 5 is __________ than a solution with pH = 7.

2 times more basic
10 times more basic
10 times more acidic
100 times more acidic

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Water, pH and Macromolecules
Polyprotic acids such as H3PO4, can act as acid-base buffers

only in combination with polyprotic bases
if their concentration is kept low
at pH values around neutrality
at pH values around any of their pKa's

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