Calculate the standard electromotive force (E | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The cell reaction is represented as $Zn|Zn^{2+}||CuI|Cu$.At the anode (oxidation): $Zn_{(s)} 	o Zn^{2+}_{(aq)} + 2e^{-}$,$E^o_{ox} = -(-0.76 \ V)

Vedclass · Accepted Answer

$0.59$

Vedclass · Answer

(A) The cell reaction is represented as $Zn|Zn^{2+}||CuI|Cu$.At the anode (oxidation): $Zn_{(s)} 	o Zn^{2+}_{(aq)} + 2e^{-}$,$E^o_{ox} = -(-0.76 \ V) = +0.76 \ V$.At the cathode (reduction): $2CuI_{(s)} + 2e^{-} 	o 2Cu_{(s)} + 2I^{-}_{(aq)}$,$E^o_{red} = -0.17 \ V$.The overall cell reaction is $Zn_{(s)} + 2CuI_{(s)} 	o Zn^{2+}_{(aq)} + 2Cu_{(s)} + 2I^{-}_{(aq)}$.The standard cell potential is $E^o_{cell} = E^o_{cathode} - E^o_{anode} = E^o_{red(cathode)} - E^o_{red(anode)}$.$E^o_{cell} = -0.17 \ V - (-0.76 \ V) = -0.17 \ V + 0.76 \ V = 0.59 \ V$.

Calculate the standard electromotive force $(E^o_{cell})$ for the following cell: $Zn|Zn^{2+} (1 \ M)||I^{-} (1 \ M)|CuI|Cu$. Given the half-cell reactions:
$CuI_{(s)} + e^{-} \to Cu_{(s)} + I^{-}_{(aq)}$ ; $E^o = -0.17 \ V$
$Zn^{2+}_{(aq)} + 2e^{-} \to Zn_{(s)}$ ; $E^o = -0.76 \ V$ (in $V$)

Similar Questions

If the standard potential of the electrochemical cell for the reaction $2Ag_{(aq)}^+ + Cd_{(s)} \to Cd_{(aq)}^{2+} + 2Ag_{(s)}$ is $1.20 \ V$,calculate the standard Gibbs free energy change in $kJ$.

Calculate the standard potential of a cell having the following electrode reactions:
$Cd_{(aq)}^{2+} + 2e^{-} \rightarrow Cd_{(s)}$ $E^{\circ} = -0.403 \ V$
$Zn_{(aq)}^{2+} + 2e^{-} \rightarrow Zn_{(s)}$ $E^{\circ} = -0.763 \ V$ (in $V$)

Two half-cell reactions are given below:
$Co^{3+} + e^- \rightarrow Co^{2+}, E^{\circ}_{Co^{3+}/Co^{2+}} = 1.81 \, V$
$Al^{3+} + 3e^- \rightarrow Al(s), E^{\circ}_{Al^{3+}/Al} = -1.66 \, V$
The standard $EMF$ of a cell with a feasible redox reaction will be:

Which of the following has the least tendency to liberate $H_2$ from mineral acids?

Which of the following metals will not evolve $H_2$ gas from dilute $H_2SO_4$ solution?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Calculate the standard electromotive force $(E^o_{cell})$ for the following cell: $Zn|Zn^{2+} (1 \ M)||I^{-} (1 \ M)|CuI|Cu$. Given the half-cell reactions:$CuI_{(s)} + e^{-} \to Cu_{(s)} + I^{-}_{(aq)}$ ; $E^o = -0.17 \ V$$Zn^{2+}_{(aq)} + 2e^{-} \to Zn_{(s)}$ ; $E^o = -0.76 \ V$ (in $V$)