Water, pH and Macromolecules
The elements oxygen, nitrogen, and carbon

are common elements in the molecules that make up living organisms
All of these
contain protons and neutrons in their atomic nuclei
can all form covalent bonds with other elements

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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
surround the ions because of their charge but do not form hydrogen bonds
share electrons with the ions to make polar covalent bonds

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