Ch. 14 & 7  IMF & chemical equations                       test                  40 points (2 extra credit points)                       chemistry

1. Identify the type of IMF in the following compounds; justify your answer by including a sketch of the appropriate shape of the compound and determining if it’s a polar or nonpolar compound with its rationale.  [10 points]

a. Sulfur tetrafluoride

b. Carbon tetrafluoride

2.  Which compound, water or carbon dioxide, has a larger boiling point ?  Justify / rationalize your answer based on the type of IMF in the compounds.   [10 points]

3.  Write the chemical equation, including information about the physical state of the chemicals.  Do not “balance” the chemical equations with the appropriate coefficients, but you’ll have to use the appropriate chemical formula.  [11 points]

a.  Mixing aqueous solutions of calcium nitrate and potassium carbonate forms an aqueous solution of potassium nitrate and a precipitate of calcium carbonate.

b.  The addition of solid sodium into liquid water forms hydrogen gas and an aqueous solution of sodium hydroxide.

c.  An aqueous solution of hydrogen peroxide decomposes into liquid water and oxygen gas.

4. Fill-in the below blanks to “balance” the chemical equations using the lowest ratio of integers; enter “1” as appropriate. [11 points]

a. ___  H2  +  ___  Cl2  →  ___ HCl

b.  ___  C3H7OH  +  ____  O2  →  ____  CO2  +  ____  H2O

c.  ____  magnesium nitrate  +  ____ lithium phosphate →  ___  magnesium phosphate  +  ___ lithium nitrate