Name: _____________________ period: ________

 

 

Chemistry test (50 points) date: __________

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

 

1. In regards to CH4, CF4, and CBr4 [15 points]

a. identify the type of IMF in each molecule.

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

c. 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. I2 (g) + KF (aq) -->

e. Li2CO3 (aq) + Cu(NO3)2 (aq) -->

 

4. Identify the species that is oxidized and reduced; write the oxidation number next to these species. [10 points]

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

b. C2H6 + O2 -->  CO2 + H2O