AP Chemistry – Chapter 4 Worksheet/Review for Chapter 17

AP Chemistry – Chapter 4 Worksheet/Review for Chapter 17
Name _______________________
Show all pertinent work on the following problems. As college students, you should know how
detailed to make this work! [You may want to use additional paper for some if not all problems!]
1. How many milliliters of solution are necessary if we are to have a 2.48 M NaOH solution that
contains 31.52 g of the dissolved solid?
2. Write the net ionic reaction for the following.
a. Potassium chloride and lead (II) nitrate solutions are mixed.
b. Solutions of ammonium nitrate and strontium chloride are poured into each other.
c. A solution of calcium hydroxide is added to a beaker of iron (III) chloride.
d. Concentrated solutions of phosphoric acid and sodium hydroxide are mixed.
e. A dilute solution of aluminum sulfate is mixed with a dilute solution of mercury (II)
3. A 125. mL sample of 0.200 M silver nitrate is added to a sodium sulfide solution prepared by
dissolving 1.10 g of Na2S dissolved in 115 mL of water.
(a) Calculate the mass of silver sulfide produced.
(b) Determine the mole of excess reactant remaining after the reaction is complete.
4. Assign oxidation numbers to each element in the following species:
a. Li2O
b. HNO3
c. Cr2O72-
d. Na2O2
e. O3
f. H2SO4
g. NO2+
Note: You may want to complete the following REDOX problems on another sheet of paper as each
will consume quite a bit of space!
5. Balance the net ionic equation for the reaction of the dioxovanadium(V) ion, VO2+, with solid
zinc in acid solution to form VO2+ ions and zinc ions.
6. Balance the following reaction which takes place in basic solution. Make sure you note the
total number of electrons transferred. This number will become very important in the coming
Cr2O72-(aq) + NO(g)  Cr3+(aq) + NO3-(aq)
7. Every year in the U.S. about 25,000 people are killed and 500,000 more are injured as a result
of drunk driving. To combat these statistics, the police use a device called a breathalyzer to test
drivers suspected of being drunk. A sample of the driver’s breath is drawn into the device,
where it is treated with a sulfuric acid solution mixed with potassium dichromate. The ethanol
in the breath is converted to acetic acid and the orange-yellow dichromate ion (from the soluble
potassium dichromate) is reduced to the green chromium (III) ion. The color change is measured
by a meter in the instrument and the blood alcohol level is determined. Write and balance this
redox reaction and note the total number of electrons transferred. [The italicized words above
are your reactants and products.]