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Water, pH and Macromolecules

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

ionic
noncovalent
hydrogen
covalent

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Water, pH and Macromolecules
The effectiveness or capacity of a buffer solution can be affected by

temperature of buffer components
molar concentration of the buffer components
concentration of the conjugate base to the weak acid
both (a) and (b)

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

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

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

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

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Water, pH and Macromolecules
What is the concentration, in moles/liter, of the hydrogen ion, if pH of a solution is 7?

5 x 10-7
7
7 x 10-7
1 x 10-7

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Water, pH and Macromolecules
The reactions of molecules

require an enzyme in all cases
All of these
are independent of the functional groups
are the reactions of the functional groups

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