Ch. 12 & 14 bonds & IMF test [60 points] Honors Chemistry

 

1. Sketch the molecule’s shape; name of molecule’s geometry / shape; and bond angle(s). [10 points]

a. IF3

b. IF5

 

2. Draw all valid Lewis structures of ___. [10 points]

a. NO3 -

b. SiO2

 

3. Use Lewis symbols to show the bonds in a compound containing aluminum and oxygen. Identify the type of bond in the compound. [hint: chemical formula is NOT AlO; 10 points]

 

4. Why does it take longer to cook food on a mountain top than at sea level ? [10 points]

 

5. Arrange the following atoms in ascending order (i.e. small to big) in terms of their electronegativity: arsenic, chlorine, phosphorus. [6 points]

 

SAT II format questions: answer sheet [14 points]

 

6. ______ 7. _____ 8. _____ 9. _____

 

I

II CE*

10. ___ ___

T F

___ ___ ___

T F

11. ___ ___

T F

___ ___ ___

T F

12. ___ ___

T F

___ ___ ___

T F

 

Score = 2 * { ____ - 0.25 * _____ } = _____ points

# correct # wrong

Part A

 

Directions: Each set of lettered choices below refers to the numbered formulas or statements immediately following it. Select the one lettered choice that best fits each formula or statement; then put your answer in the answer sheet. In each set, a choice may be used once, more than once, or not at all.

 

Questions 6 – 9

a. hydrogen bond IMF

b. dipole – dipole IMF

c. London dispersion IMF

d. chemical bond

e. none of the above

 

6. Water has ___.

7. Carbon dioxide has ___.

8. The strongest type of IMF is ___.

9. The Na+ in a solution of NaCl (dissolved in water) has ___.

 

Part B

 

Directions: Each question below consists of two statements, statement I in the left-hand column and statement II in the right-hand column. For each question, determine whether statement I is true or false and whether statement II is true or false. Then, put a “x” in the corresponding T or F blank on your answer sheet. Put a “x” under CE only if statement II is a correct explanation of statement I.

 

I

 

II

10. CO2 has a higher vapor pressure than H2O

BECAUSE

CO2 has a stronger IMF than H2O

11. CS2 has a lower boiling point than NH3

BECAUSE

CS2 has a weaker IMF than NH3

12. The C – Cl bond is more polar than the C – Br bond

BECAUSE

Cl is more electronegative than Br