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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.

covalent
hydrogen
ionic
noncovalent

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

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

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Water, pH and Macromolecules
The lone pair electrons on oxygen in a H20 molecule

carry a partial positive charge
are not important for the properties of water
form covalent bonds in ice
carry a partial negative charge

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

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

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

octanol
methanol
ethanol
butanol

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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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