Name: _____________________ period: ________

Honors Chemistry test (70 points) date: __________

 

Ch. 14, 7, 8, 18 IMF, chemical equations, & chemical Rx

 

1. In regards to CH3CH2CH3, CH3CH2OH, and CH3OCH3 [20 points]

a. identify the type of compound: polar versus nonpolar; justify your answer.

b. identify the type of IMF in each molecule.

c. which molecule has the strongest IMF ? weakest IMF ? Justify your answer.

d. which molecule has the highest vapor pressure ? lowest vapor pressure ? Justify your answer.

 

2. Balance the chemical equation using the lowest ratio of coefficients. [10 points]

a. ___ C2H6 + ___ O2 -->  ___ CO2 + ___ H2O

b. ___ Ca(NO3)2 + ___ K3PO4 -->  ___ Ca3(PO4)2 + ___ KNO3

 

3. Write the net ionic equation; need not balance the coefficients. [15 points]

a. HBr (aq) + Zn (s)  -->

b. Na2CO3 (aq) + HCl (aq) -->

c. C3H8 (l) + O2 (g) -->

d. bubble iodine gas into a solution of potassium fluoride

e. mix aqueous solutions of lithium carbonate and copper (II) nitrate

 

4. Identify the species that is oxidized and reduced; write the oxidation number next to these species. [15 points]

a. Cu + HNO3 -->  Cu(NO3)2 + NO2 + H2O

b. C2H6 + O2 -->  CO2 + H2O

c. (hydrogen peroxide) H2O2 -->  H2O + O2

 

5. Which compound, CH4 versus CH3CH3, has the larger IMF ? Justify your answer; include polarizability in your answer. [10 points]