# What is an example of an oxidation reaction practice problem?

Jan 13, 2016

See below

#### Explanation:

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

$K M n O 4 + H C l \rightarrow K C l + M n C {l}_{2} + C {l}_{2} + {H}_{2} O$
$K I {O}_{3} + K I + {H}_{2} S {O}_{4} \rightarrow {I}_{2} + {H}_{2} O + {K}_{2} S {O}_{4}$

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

${S}_{2} {O}_{8}^{- 2}$ goes to $S {O}_{4}^{- 2}$
$C {r}^{+ 3}$ goes to $C {r}_{2} {O}_{7}^{- 2}$
$C {l}^{-}$ goes to $C {l}_{2}$
Knowing the persulfate has ammonium as a counterion and the chloride is a counterion to chrome III, in an acid medium with ${H}_{2} S {O}_{4}$ 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
$2 A {g}^{0} + Z {n}^{+ 2} \rightarrow 2 A {g}^{+} + Z {n}^{0}$
$3 F e + 2 C u S {O}_{4} + 4 N a O H \rightarrow 2 C u + F {e}_{3} {O}_{2} + 2 {H}_{2} O + 2 N {a}_{2} S {O}_{4}$

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 $20 , 00 m L$ aliquots consumed $13 , 20 m L$, $13 , 20 m L$ and $13 , 25 m L$ 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] || $A g$ | $A g X$, $X$ [1,053 mol/L]

That has $\Delta E = 0 , 1435 V$, determine the $K s p$ of $A g X$

And of course, any mix of these in any proportions