Water, pH and Macromolecules
Which of the following statements about water is correct?

It is critical for many of the chemical processes found in living systems
Polar substances that can form hydrogen bonds will dissolve in it
Nonpolar substances like oils are not soluble in it
All of these

ANSWER DOWNLOAD EXAMIANS APP

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
form hydrogen bonds with the positively and negatively charged ions
surround the ions because of their charge but do not form hydrogen bonds

ANSWER DOWNLOAD EXAMIANS APP

Water, pH and Macromolecules
Buffer solutions

will always have a pH of 7
are rarely found in living systems
tend to maintain a relatively constant pH.
cause a decrease in pH when acids are added to them.

ANSWER DOWNLOAD EXAMIANS APP