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Copper from copper sulphate solution can...

Copper from copper sulphate solution can be displaced by …………. The standard reducation potentials of some electrodes are given below:
(a) `E^(@) (Fe^(2+), Fe) = -0.44 V`
(b) `E^(@) (Zn^(2+), Zn) = -0.76 V`
(c) `E^(@) (Cu^(2+), Cu) = +0.34 V`
(d) `E^(@) (H^(+), 1//2H_(2)) = +0.34 V`

A

`H^(2)`

B

`Zn`

C

`Cr`

D

`Fe`

Text Solution

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All have more `E_(OP)^(@)` values than `E_(O_(Cu))`
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Copper from copper sulphate solution can be displacesd by. (The standard reduction potentials of some electrodes are given below): E^(o)(Fe^(2+)//Fe) = - 0.44 V, E^(o) (Zn^(2+)//Zn) = - 0.76 V E^(o) (Cu^(2+)//Cu) = + 0.34 V: E^(o)(Cr^(3+)//Cr) = - 0.74 V E^(o) (H^(+0)/H_(2)) = 0.00V

E^(@) of Fe^(2 +) //Fe = - 0.44 V, E^(@) of Cu //Cu^(2+) = -0.34 V . Then in the cell

The 0.1M copper sulphate solution in which copper electrode is dipped at 25^(@)C . Calculate the electrode potential of copper electrode. [Given : E^(0) Cu^(+2)//Cu = 0.34V]

The standard cell potential for the cell Zn|Zn^(2+) (1 M)|| Cu^(2+) (1 M)| Cu Given E_(Cu^(2+)//Cu)^(@) = 0.34 V and E_(Zn^(2+)//Zn)^(@) = - 0.76 V is

For the given cell arrangement identify incorrect statement given E^@_(Cu^(2+)//Cu) = 0.34V & E^@_(Zn^(2+)//Zn) = -0.76V

The standard reduction potential data at 25^(@)C is given below E^(@) (Fe^(3+), Fe^(2+)) = +0.77V , E^(@) (Fe^(2+), Fe) = -0.44V , E^(@) (Cu^(2+),Cu) = +0.34V , E^(@)(Cu^(+),Cu) = +0.52 V , E^(@) (O_(2)(g) +4H^(+) +4e^(-) rarr 2H_(2)O] = +1.23V E^(@) [(O_(2)(g) +2H_(2)O +4e^(-) rarr 4OH^(-))] = +0.40V , E^(@) (Cr^(3+), Cr) =- 0.74V , E^(@) (Cr^(2+),Cr) = - 0.91V , Match E^(@) of the redox pair in List-I with the values given in List-II and select the correct answer using the code given below teh lists: {:(List-I,List-II),((P)E^(@)(Fe^(3+),Fe),(1)-0.18V),((Q)E^(@)(4H_(2)O hArr 4H^(+)+4OH^(+)),(2)-0.4V),((R)E^(@)(Cu^(2+)+Curarr2Cu^(+)),(3)-0.04V),((S)E^(@)(Cr^(3+),Cr^(2+)),(4)-0.83V):} Codes:

Standard reduction potential values for the electrodes are given below. Mg^(2+)2e^(-) rarrMg " is" -2.37V Zn^(2+) +2e^(-) rarrZn " is"-0.76V Fe^(2+)+2e^(-)rarrFe " is"-0.44V Which of the following statement is correct

Calculate the maximum work that can be obtained from the decimolar Daniell cell at 25^(@)C . Given E^(c-)._((Zn^(2+)|Zn))=-0.76V and E^(c-)._((Cu^(2+)|Cu))=0.34V

P BAHADUR-ELECTROCHEMISTRY-Exercise (9) ADVANCED NUMERICAL PROBLEMS
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