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

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
make nonpolar covalent bonds with the positively charged ions only

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

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

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Water, pH and Macromolecules
Which of the following character does not apply to water?

The water molecule readily forms hydrophobic interactions
All three atoms in the water molecule readily form hydrogen bonds
The water molecule is asymmetric
The covalent bonds in water are highly polarized

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