Chemistry

Problem

Determine the standard cell potential,

E^{\circ}_{\text{cell}}

, for a galvanic cell composed of the following half-cells under standard conditions. Fe

^{3+}

+ e

^{-}

→ Fe

^{2+}

E^{\circ}=+0.77\,\text{V}

^{3+}

+ 3 e

^{-}

→ Al(s)

E^{\circ}=-1.66\,\text{V}

Which of the following is the value of

E^{\circ}_{\text{cell}}

? a)

-0.89\,\text{V}

+2.43\,\text{V}

-2.43\,\text{V}

+0.89\,\text{V}