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Water, pH and Macromolecules

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

argon
gasoline (heptanes & octanes)
methane
sodium chloride

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

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

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Water, pH and Macromolecules
Which of the following alcohols would be most soluble in water?

methanol
octanol
ethanol
butanol

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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
temperature of buffer components
both (a) and (b)
molar concentration of the buffer components

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

molecules
ions
none of these
acids

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

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

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