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
form hydrogen bonds with the positively and negatively charged ions
share electrons with the ions to make polar covalent bonds

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

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

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

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

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