Chemistry Tri-1 Final Exam Study Guide
Predicting Products, Redox, and the Activity Series: Predict the
products given the reactants. Tell me what type of reaction it is, and if
it’s a molecular, complete ionic(if possible), and net ionic(if possible)
equation. If there is no equation, write N/A. Balance. Show the states.
If it’s a redox, tell me the active metal, the oxidized and reduced
elements, and use the lines when balancing. If there is no reaction
made, don’t do the above. Just show me there’s no reaction and
explain why.
1. Ca(NO3)2(aq) +
Na3PO4(aq)
2. lead(II) nitrate + potassium
3. Pb(s) +
?+?
iodide ? + ?
H3PO4(aq) H2(g) + Pb3(PO4)2(s)
4. C5H9O +
5. C2H6 +
O2 CO2 + H2O
O2 ? + ?
6. MnO 4-(aq) +
CH3OH(l) HCO2H(l) + Mn2+(aq)
7. Cr2O72-(aq) +
Fe2+(aq) Cr3+(aq) + Fe3+(aq) + H2O(l)
8. Magnesium is reacted with hydrochloric acid to form magnesium
chloride(aq) and hydrogen gas. Balance.
9. I have two beakers. Beaker 1 has a zinc nitrate solution. Beaker 2
has an iron(II) nitrate solution. I put a strip of iron into B1 and zinc
strip into B2. Rxn?
10. Sodium hydroxide and sulfuric acid are placed in a beaker. Rxn?
11. K2S(aq) + N2(NO3)2(aq)
12. Ca(s) +
KNO3(aq) + NiS(s)
Na2SO4(aq) rxn?
Empirical and Molecular Formulas (from the book)
1. There are two binary compounds of mercury and oxygen. Heating
either of them results in the decomposition of the compound, with
oxygen gas escaping into the atmosphere while leaving a residue of
pure mercury. Heating 0.6498 g of one of the compounds leaves a
residue of 0.6018 g. Heating 0.4172 g of the other compound results in
a mass loss of 0.016 g. Determine the empirical formula of each
compound.
2. A sample of urea contains 1.121 g N, 0.161 g H, 0.480 g C, and 0.640
g O. What is the empirical formula of urea?
3. A compound that contains only nitrogen and oxygen is 30.4% N by
mass; the molar mass of the compound is 92 g/mol. What is the
empirical formula of the compound? What is the molecular formula of
the compound?
4. A compound containing only sulfur and nitrogen is 69.6% S by
mass; the molar mass is 184 g/mol. What are the empirical and
molecular formulas of the compound?
5. Adipic acid is an organic compound of 49.31% C, 43.79% O, and the
rest hydrogen. f the molar mass of Adipic acid is 146.1 g/mol, what are
the empirical and molecular formulas for adipic acid.
6. Maleic acid is an organic compound composed of 41.39% C, 3.47%
H, and the rest oxygen. If 0.129 mol of maleic acid has a mass of 15.0
g, what are the empirical and molecular formulas for maleic acid?
7. Many homes in the rural America are heated by propane gas, a
compound that contains only carbon and hydrogen. Complete
combustion of a sample of propane produced 2.641 g of carbon dioxide
and 1.442 g of water as the only products. Find the empirical formula
of propane.
8. A compound contains only C, H, and N. Combustion of 35.0 mg of
the compound produces 33.5 mg CO2 and 41.1 mg H2O. What is the
empirical formula of the compound?
10. Cumene is a compound containing only carbon and hydrogen that
is used in the production of acetone and phenol in the chemical
industry. Combustion of 47.6 mg cumene produces some CO2 and 42.8
mg water. The molar mass of cumene is between 115 g/mol and 125
g/mol. Determine the empirical and molecular formulas.
12. A compound contains only carbon, hydrogen, and oxygen.
Combustion of the compound yields 16.01 mg CO2 and 4.37 mg H2O.
The molar mass of the compound is 176.1 g/mol. Empirical and
molecular formulas?
VSPER and Polarity: draw the VSPER structures and determine if they
are polar or nonpolar.
-always related to ________________
-intermolecular forces:
-_______________ bonds
-H + F, H + O, H + N
-circle: real or not real
-intramolecular forces:
1. nitrogen trifluoride
2. CH2F
3. boron trichloride
4. PBr5
5. water
How
1.
2.
3.
4.
5.
6.
7.
many Sig Figs?
0.000000006
___________
35645
_____________
360000
_____________
8.0000000009
___________
360000.
______________
46.456 + 8.9
___________
35.73 x 745.5457 ___________
What are the 3 trends? Draw their directions and give their
definitions.
1.
2.
3.
Are there any others?
Rank the following from greatest to least by first ionization
energy: C, F, Ag, Li
__________>___________>__________>_____________
Ba, Ba2+
F, F
–
Rank the following from least to greatest by electronegativity:
C, F, Ag, Li
__________<___________<__________<_____________
Ba, Ba2+
F, F
–
Rank the following from greatest to least by atomic radius:
C, F, Ag, Li
__________>___________>__________>_____________
Ba, Ba2+
F, F
-