Lawrie Ryan and Roger Norris Solutions for Chapter: Electrochemistry, Exercise 15: Questions

State the direction of the electron flow in the electrochemical cell represented by the following pair of half-equations. Use the given data to help you.
${\mathrm{F}}_2 + 2{\mathrm{e}}^{-} \rightleftharpoons 2{\mathrm{F}}^{-} {\mathrm{E}}^{⊝}=+2.87 \mathrm{V}$  and
${\mathrm{Mn}}^{2+} + 2{\mathrm{e}}^{-} \rightleftharpoons \mathrm{Mn} {\mathrm{E}}^{⊝}=-1.18 \mathrm{V}$

State the direction of the electron flow in the electrochemical cell represented by the following pair of half-equations. Use the given data to help you.

${\mathrm{Sn}}^{4+} + 2{\mathrm{e}}^{-} \rightleftharpoons {\mathrm{Sn}}^{2+} {\mathrm{E}}^{⊝}=+0.15 \mathrm{V}$ and
${\mathrm{I}}_2 + 2{\mathrm{e}}^{-} \rightleftharpoons 2{\mathrm{I}}^{-} {\mathrm{E}}^{⊝}=+0.54 \mathrm{V}$

State the direction of the electron flow in the electrochemical cell represented by the following pair of half-equations. Use the given data to help you.

${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}+ 14{\mathrm{H}}^{+}+6{\mathrm{e}}^{-} \rightleftharpoons 2{\mathrm{Cr}}^{3+} +7{\mathrm{H}}_2\mathrm{O} {\mathrm{E}}^{⊝}=+1.33 \mathrm{V}$ and
${\mathrm{Cu}}^{2+}+2{\mathrm{e}}^{-}\rightleftharpoons \mathrm{Cu} {\mathrm{E}}^{⊝}=+0.34 \mathrm{V}$

State the direction of the electron flow in the electrochemical cell represented by the following pair of half-equations. Use the given data to help you.

${\mathrm{Ni}}^{2+} +2{\mathrm{e}}^{-} \rightleftharpoons \mathrm{Ni} {\mathrm{E}}^{⊝}=-0.25 \mathrm{V}$ and
${\mathrm{Fe}}^{3+} + 3{\mathrm{e}}^{-} \rightleftharpoons \mathrm{Fe} {\mathrm{E}}^{⊝}=-0.04 \mathrm{V}$