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Honors Chemistry – Essay Portion Final Exam Review
mmmmmName:____________________________________ Mods:_____________________
Stoichiometry
1a. Write the balanced equation for the combustion of butane.
b. What is the maximum amount of water that can be made when 8.5 Liters of oxygen and 15.5
Liters of butane react at STP ? What is the limiting reactant?
c. How much of the excess reactant is left over?
Honors Chemistry – Essay Portion Final Exam Review
Acid Base
2a. Write the balanced equation for the neutralization reaction between hydrochloric acid and
sodium hydroxide
2b. What is the molarity of the base using the data listed below:
MA = .750 M MB =
VA = 15.5 mL VB = 8.3 mL
2c. How many grams of sodium hydroxide were needed to make 1.5 L of the above solution?
2d. What color would the indicators be in acidic solution?
Phenolphthalein _______________________________
Bromothymol Blue _______________________________
Red litmus paper _______________________________
Blue litmus paper _______________________________
Number on pH paper _______________________________
Honors Chemistry – Essay Portion Final Exam Review
Gas Laws and empirical formula
3a. A compound has the empirical formula CHCl. A 256 mL flask, at 373 K and 750 torr, contains
0.800 grams of the gaseous compound. Determine the molar mass of the gas.
3b. Determine the molecular formula
3c. The enthalpy of combustion of this gas is found to be -1850 kJ/mol. If 25.0 grams of this gas were
burned in air, how much heat would be released
3d. Draw an enthalpy diagram for the combustion of 1 mole of this substance. Be sure to label the
location of the reactants, products, x axis, y axis and enthalpy change.
Honors Chemistry – Essay Portion Final Exam Review
4. Draw the voltaic cell for the reaction between the reactions listed below.
Be sure to label and include:
Cathode
Anode
Salt bridge
Wire
Aqueous solutions involved
Voltage of cell
Direction of electron flow
Which electrode is gaining mass
Which electrode is losing mass
Which solution is increasing in concentration
Which solution is decreasing in concentration
Al+3 + 3e- Al -1.66 V
Ag+ + 1e- Ag +0.80 V
Honors Chemistry – Essay Portion Final Exam Review
5. Write the complete balanced chemical equations for the reactants and products for any FIVE of
the laboratory situations below. If you answer more than five questions, only the first five
answered will be graded. In all cases, a reaction occurs. Be sure to includes states of matter in
your reactions. (3 points per reaction)
a) Nitric acid is added to calcium carbonate
b) Propane gas undergoes combustion with oxygen gas
c) silver metal is mixed with hydrochloric acid
d) Solutions of calcium nitrate and potassium sulfate are mixed
e) A solution of Hydrochloric acid is added to a solution of sodium hydroxide
f) Solutions of silver nitrate and sodium chloride are combined
Honors Chemistry – Essay Portion Final Exam Review
6. A solution is prepared by mixing 85.67 grams of potassium iodide in 2.25 liters of water. The density
of water is 1 g/mL.
a) Determine the molality of this solution.
b) The Kf for water is 1.86 J/goC. Calculate the new freezing point of the potassium iodide solution.
c) Would the freezing point be different if the same molality of sodium chloride was used?
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