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Water, pH and Macromolecules

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

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

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

butanol
octanol
ethanol
methanol

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

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

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

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

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

gasoline (heptanes & octanes)
sodium chloride
argon
methane

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Water, pH and Macromolecules
If protein is made exclusively from nonpolar amino acids, then it will this protein interact with water?

It will be attracted to water
It will form a membrane in water
It will act as a buffer and stabilize the pH
be repelled by water

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