What is an example of an oxidation reaction practice problem?

1 Answer
Jan 13, 2016

Answer:

See below

Explanation:

"Balance the equation" type problems, e.g.:

#KMnO4 + HCl rarr KCl + MnCl_2 + Cl_2 + H_2O#
#KIO_3 + KI + H_2SO_4 rarr I_2 + H_2O + K_2SO_4#

"Given that X goes to Y and Z goes to W, present the balanced equation" type problems, e.g.:

#S_2O_8^(-2)# goes to #SO_4^(-2)#
#Cr^(+3)# goes to #Cr_2O_7^(-2)#
#Cl^(-)# goes to #Cl_2#
Knowing the persulfate has ammonium as a counterion and the chloride is a counterion to chrome III, in an acid medium with #H_2SO_4# as the proton donor, balance the equation

(For a simpler exercise say it's chrome III sulfate instead of chloride)

"Knowing the #E_0#s, state if the reaction is spontaneous or not" type problems, e.g.:

Choose which are the spontaneous reactions
#2Ag^0 + Zn^(+2) rarr 2Ag^+ + Zn^0#
#3 Fe + 2 CuSO_4 + 4 NaOH rarr 2 Cu + Fe_3O_2 + 2 H_2O + 2 Na_2SO_4#
With access to a potential table

If you're on a more advanced track, you can start throwing in more advanced situations, like

"The titration saga" type problems, e.g.:

A technician is analyzing the quantity of ascorbic acid in a certain brand's orange juice, knowing that it's reaction involves two electrons, and that #20,00 mL# aliquots consumed #13,20 mL#, #13,20 mL# and #13,25 mL# of a solution made by dissolving #35,7251 g# of potassium iodate in one liter, how many grams of ascorbic acid were on that juice?

Or, the "redox cell" type problems, e.g.:

Given the cell

#H_2# | #H^+# [1,000 mol/L] || #Ag# | #AgX#, #X# [1,053 mol/L]

That has #DeltaE = 0,1435 V#, determine the #Ksp# of #AgX#

And of course, any mix of these in any proportions