What must be the concentration of Ag^{+} in a | vedclass

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

Question

(C) For simultaneous deposition,the reduction potentials of both ions must be equal at the cathode.Using the Nernst equation for both half-reactions:$

Vedclass · Accepted Answer

nearly $10^{-8} \ M$

Vedclass · Answer

(C) For simultaneous deposition,the reduction potentials of both ions must be equal at the cathode.Using the Nernst equation for both half-reactions:$E_{Cu^{2+}/Cu} = E^0_{Cu^{2+}/Cu} + \frac{0.0591}{2} \log [Cu^{2+}]$$E_{Ag^{+}/Ag} = E^0_{Ag^{+}/Ag} + 0.0591 \log [Ag^{+}]$Equating the two potentials:$0.34 + \frac{0.0591}{2} \log(1.0) = 0.812 + 0.0591 \log [Ag^{+}]$Since $\log(1.0) = 0$,the equation becomes:$0.34 = 0.812 + 0.0591 \log [Ag^{+}]$$0.0591 \log [Ag^{+}] = 0.34 - 0.812 = -0.472$$\log [Ag^{+}] = \frac{-0.472}{0.0591} \approx -7.986 \approx -8$$[Ag^{+}] = 10^{-8} \ M$

What must be the concentration of $Ag^{+}$ in an aqueous solution containing $Cu^{2+} = 1.0 \ M$ so that both the metals can be deposited on the cathode simultaneously? Given that $E^0_{Cu^{2+}/Cu} = 0.34 \ V$ and $E^0_{Ag^{+}/Ag} = 0.812 \ V$ at $T = 298 \ K$.

Similar Questions

Which of the following is correct as a Nernst equation for the given electrochemical cell ?
$Mg_{(s)}|Mg_{(aq)}^{2+}(0.1 \ M)||Cl_{(aq)}^{-}(0.1 \ M)|Cl_{2_{(g)}}(1 \ bar)|Pt_{(s)}$

In the following reaction,what is the value of equilibrium constant?
$Cu_{(s)} + 2 Ag_{(aq)}^{+} \rightarrow Cu_{(aq)}^{2+} + 2 Ag_{(s)}$
$E_{cell}^0 = 0.46 \ V$

Give the Nernst equation for the electrode potential $E_{(M^{n+} \mid M)}$.

For a cell reaction involving a two-electron change,the standard emf of the cell is found to be $0.295 \ V$ at $25 \ ^oC$. The equilibrium constant of the reaction at $25 \ ^oC$ will be

Calculate the concentration of $Cu^{2+}$ in a $Cu$ plate kept in a $0.2 \ M$ $CuSO_4$ solution when the potential becomes $0.0 \ V$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module