AP Bio Chapter 3 Barron Study Guide Practice

In a water molecule, hydrogen atoms are attached to oxygen atoms through which type of bond?

• hydrogen bond

• nonpolar covalent bond

• polar covalent bond

• ionic bond

The attraction between the partially positive charge on a hydrogen atom on one water molecule and the partially negative charge on an oxygen atom on another water molecule is called a(n)

• hydrogen bond

• nonpolar covalent bond

• polar covalent bond

• ionic bond

Water's high specific heat is due to

• the lower density of solid ice compared to that of liquid water

• the amount of energy required to break the covalent bonds within a water molecule

• the amount of energy required to break the hydrogen bonds between water molecules

• the low electronegativity of oxygen atoms compared to that of hydrogen atoms

Which of the following solutions has the greatest concentration of H+?

• stomach acid with a pH of 2

• acetic acid with a pH of 3

• coffee with a pH of 5

• bleach with a pH of 12

Solution A has a pH of 4; solution B has a pH of 7. How do the [H+] in these solutions compare?

• Solution A has 3 times the [H+] concentration of Solution B

• Solution A has 30 times the [H+] concentration of Solution B

• Solution A has 1,000 times the [H+] concentration of Solution B

• Solution A has 3,000 times the [H+] concentration of Solution B

Coastal areas near large bodies of water tend to have more stable climates than inland areas at the same latitude. Which of the following is the property of water that best explains this difference in climate?

• high surface tension

• high specific heat

• capillary action

• density of ice

Small, lightweight insects can walk on the surface of water, as seen in the following figure. Which of the following is the property of water that best explains this phenomenon?

• high surface tension

• high specific heat

• capillary action

• density of ice