Water, pH and Macromolecules
Most of the important functional groups in biological molecules contain

oxygen and/or nitrogen and are acidic
oxygen and/or nitrogen and are polar
oxygen and a phosphate
nitrogen and a phosphate

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Water, pH and Macromolecules
Salt dissolves well in water as water molecules

surround the ions because of their charge but do not form hydrogen bonds
make nonpolar covalent bonds with the positively charged ions only
share electrons with the ions to make polar covalent bonds
form hydrogen bonds with the positively and negatively charged ions

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