1. The pH of the blood is slightly basic. Which of the following would be appropriate?
a. 6.4
b. 4.6
c. 4.7
d. 7.4
e. 13.8
2. When hydrogen chloride a strong acid is added to water, the pH
a. goes up
b. stays the same
c. goes down
d. cannot be determined
3. True or False. The octet rule says that atoms react with one another in order to achieve four electrons in their outer shell.
4. The molecule, K+Cl-, is held together by ______ bonds.
a. ionic
b. covalent
c. polar
d. hydrogen
e. James
5. If an atom either gains or loses an electron, the atom is called a(an) ______.
a. molecule
b. compound
c. ion
d. element
6. Which type of bond will share electrons between atoms?
a. ionic
b. covalent
c. hydrogen
d. peptide
7. Individual water molecules are joined together by ______.
a. ionic bonds
b. covalent bonds
c. hydrogen bonds
d. peptide bonds
8. Which of the following statements is NOT a true characteristic of water?
a. Hydrogen bonding causes water molecules to be cohesive.
b. Without hydrogen bonding, water would boil at -80° C and freeze at -100° C.
c. Water absorbs a great deal of heat before it evaporates.
d. Water keeps an animal's body temperature within normal limits.
e. Because of hydrogen bonding, liquid water is less dense than ice
9. ______ are molecules that dissociate in water, releasing hydrogen ions.
a. Bases
b. Acids
c. Salts
d. Buffers
e. Carbohydrates
10. At which pH will the concentration of hydrogen ions be equal to the concentration of hydroxide ions?
a. pH 1
b. pH 5
c. pH 7
d. pH 9
e. pH 14
11. ______ are chemicals or combinations of chemicals that take up excess hydrogen ions or hydroxide ions in order to keep the pH constant.
a. Acids
b. Bases
c. Salts
d. Buffers
e. Carbohydrates
12. True or False. Acids have a pH that is greater than 7, whereas bases have a pH that is less than 7