What is electrode potential in a galvanic cell? Explain in detail.
(N/A) Definition: $A$ potential difference that develops between the electrode and the electrolyte is called electrode potential.
$(b)$ Standard electrode potential: When the concentrations of all the species involved in a half-cell are unity $(1 \ M)$,the electrode potential is known as standard electrode potential. According to $IUPAC$ convention,standard reduction potentials are now called standard electrode potentials.
$(c)$ Anode and cathode in electrode potential:
$(i)$ In a galvanic cell,the half-cell in which oxidation takes place is called the anode,and it has a negative potential with respect to the solution.
$(ii)$ The other half-cell in which reduction takes place is called the cathode,and it has a positive potential with respect to the solution.
$(b)$ Standard electrode potential: When the concentrations of all the species involved in a half-cell are unity $(1 \ M)$,the electrode potential is known as standard electrode potential. According to $IUPAC$ convention,standard reduction potentials are now called standard electrode potentials.
$(c)$ Anode and cathode in electrode potential:
$(i)$ In a galvanic cell,the half-cell in which oxidation takes place is called the anode,and it has a negative potential with respect to the solution.
$(ii)$ The other half-cell in which reduction takes place is called the cathode,and it has a positive potential with respect to the solution.
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Similar Questions
If the standard reduction potentials for four divalent elements $X, Y, Z,$ and $W$ are $-1.46 \ V, -0.36 \ V, 0.15 \ V,$ and $-1.24 \ V$ respectively,then:
Medium
View SolutionCalculate the standard cell potential for a cell having the following reaction: $2 Al_{(s)} + 3 Ni^{2+} \rightarrow 2 Al^{3+} + 3 Ni_{(s)}$ given that $E_{Ni^{2+}/Ni}^{\circ} = -0.25 \ V$ and $E_{Al^{3+}/Al}^{\circ} = -1.66 \ V$. (in $V$)
Given:
$Fe^{3+}_{(aq)} + e^- \to Fe^{2+}_{(aq)}; E^o = +0.77 \ V$
$Al^{3+}_{(aq)} + 3e^- \to Al_{(s)}; E^o = -1.66 \ V$
$Br_{2(aq)} + 2e^- \to 2Br^-_{(aq)}; E^o = +1.09 \ V$
Considering the electrode potentials,which of the following represents the correct order of reducing power?
$Fe^{3+}_{(aq)} + e^- \to Fe^{2+}_{(aq)}; E^o = +0.77 \ V$
$Al^{3+}_{(aq)} + 3e^- \to Al_{(s)}; E^o = -1.66 \ V$
$Br_{2(aq)} + 2e^- \to 2Br^-_{(aq)}; E^o = +1.09 \ V$
Considering the electrode potentials,which of the following represents the correct order of reducing power?
DifficultJEE MAIN 2014
View SolutionThe standard reduction potentials for $Zn^{2+}/Zn$,$Ni^{2+}/Ni$,and $Fe^{2+}/Fe$ are $-0.76 \, V$,$-0.23 \, V$,and $-0.44 \, V$ respectively. For which of the following combinations will the reaction $X + Y^{2+} \rightarrow X^{2+} + Y$ be spontaneous?
Easy
View SolutionThese are physical properties of an element:
$(A)$ Sublimation enthalpy
$(B)$ Ionisation enthalpy
$(C)$ Hydration enthalpy
$(D)$ Electron gain enthalpy
The total number of the above properties that affect the reduction potential is $......$ .
$(A)$ Sublimation enthalpy
$(B)$ Ionisation enthalpy
$(C)$ Hydration enthalpy
$(D)$ Electron gain enthalpy
The total number of the above properties that affect the reduction potential is $......$ .
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