Given, standard electrode potentials, `{:(Fe^(3+)+3e^(-) rarr Fe,,,E^(@) = -0.036 " volt"),(Fe^(2+)+2e^(-)rarr Fe,,,E^(@) = - 0.440 " volt"):}` The st

Question

Given, standard electrode potentials, `{:(Fe^(3+)+3e^(-) rarr Fe,,,E^(@) = -0.036 " volt"),(Fe^(2+)+2e^(-)rarr Fe,,,E^(@) = - 0.440 " volt"):}` The st

Given, standard electrode potentials,
`{:(Fe^(3+)+3e^(-) rarr Fe,,,E^(@) = -0.036 " volt"),(Fe^(2+)+2e^(-)rarr Fe,,,E^(@) = - 0.440 " volt"):}`
The standard electrode potential `E^(@)` for `Fe^(3+) + e^(-) rarr Fe^(2+)` is :
A. `-0.476 ` V
B. `-0.404` V
C. `0.404` V
D. `+0.772` V

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

Related Questions

Normal aluminium electrode coupled with normal hydrogen electrode gives an emf of 1.66 volts . So the standard electrode potential of aluminium is

2 Answers 4 Views

The standard electrode potentials `(E^(@)) " for " Ocl^(-)//Cl^(-) " and " Cl^(-)//(1)/(2) Cl_(2)` respectively are 0.94 V and `-1.36 V`. The `E^(@)`

2 Answers 6 Views

The standard electrode potentials of four elements A, B, C and D are `-3.05, 1.66, -0.40` and 0.80 volt. The highest chemical activity will be shown b

2 Answers 4 Views

If the standard electrode poten tial of `Cu^(2+)//Cu` electrode is 0.34V. What is the electrode potential of 0.01 M concentration of `Cu^(2+)`?

2 Answers 6 Views

The standard reduction potentials of `Cu^(2+)//Cu` and `Ag^(+)//Ag` electrodes are 0.337 volt and 0.799 volt respectively. Construct a galvanic cell u

2 Answers 4 Views

There iron sheets have been coated separately with three metals (A,B and C ) whose standard electrode potentials are given below. `{:("Metal"," "A," "

2 Answers 23 Views

Given that standard electrode potentials`(E^(@))` of metals are : `K^(+)//K=-2.93" V",Ag^(+)//Ag=0.80" V",Cu^(2+)//Cu=0.34" V", Mg^(2+)//Mg=-2.37" V"`

2 Answers 4 Views

Standard electrode potentials are given as, `E_(Cu^(2+)//Cd)^(@)=0.34" V " " and " E_(Ag^(+)//Ag)^(@)=0.80" V "` Calculate the cell potential, E for c

2 Answers 7 Views

(a) Standard reduction potentials of zinc and copper electrodes are -0.76 V and 0.34 V respectively.Which electrode will undergo oxidation and which l

2 Answers 5 Views

Given the standard electrode potentials `F_(2)//F^(-)=+2.85" V ", Cl_(2)//Cl^(-)=+1.36" V ", Br_(2)//Br^(-)=+1.06" V "` and `I_(2)//I^(-)=+0.34" V "`.

2 Answers 4 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - D
`Fe^(2+) + 2e^(-) to Fe `,
`DeltaG_(1)^(@) = - n FE_(1)^(@)`
= `-2 F(-0.44) = 0.88 F " " … (i)`
`Fe^(3+) + 3e^(-) to Fe`,
`DeltaG_(2)^(@) = - nFE_(2)^(@)`
`= -3 F (-0.036) = 0.108 F " " … (ii)`
Eqn. (ii) and (i) gives
`Fe^(3+) + 3e^(-) to Fe^(2+)`
`DeltaG^(@) = DeltaG_(2)^(@) - Delta G_(1)^(@) = 0.018 F - 0.88 F = -0.772` F
`therefore Delta G^(@) = - n F E_(cell)^(@) = -0.772`
`therefore E_(cell)^(@) = (0.772)/(n) = (0.772)/(1) = 0.772` V