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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.

noncovalent
hydrogen
covalent
ionic

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Water, pH and Macromolecules
Which of the following will easily dissolve in a polar solvent?

sodium chloride
methane
gasoline (heptanes & octanes)
argon

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Water, pH and Macromolecules
Most of the important functional groups in biological molecules contain

oxygen and a phosphate
nitrogen and a phosphate
oxygen and/or nitrogen and are acidic
oxygen and/or nitrogen and are polar

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Water, pH and Macromolecules
H2O and CH4 are both examples of

molecules
acids
ions
none of these

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

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

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

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

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