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

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

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Water, pH and Macromolecules
Which of the following statements about water is correct?

All of these
It is critical for many of the chemical processes found in living systems
Nonpolar substances like oils are not soluble in it
Polar substances that can form hydrogen bonds will dissolve in it

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

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

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