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

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

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

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

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