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

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

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Water, pH and Macromolecules
The main difference between an acid and a base is that

bases donate hydrogen ions in water while acids accept hydrogen ions
acids donate hydrogen ions in water while bases accept hydrogen ions
bases are polar molecules and acids are not
acids are polar molecules and bases are not

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Water, pH and Macromolecules
Which of the following statements about covalently bonded molecules is false?

Noncovalent bonds may also be present, especially if the molecule is large
Such molecules often result from the interaction of ionized atoms
Electrons are shared between the atoms that make up the molecule
The chemical bonds that hold the molecule together are relatively strong

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