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

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

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

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

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

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