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For the given cell arrangement identify ...

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

A

If `E_(ext) gt` 1.1 V , Zn dissolves at Zn
electrode and Cu deposits at Cu electrode

B

If `E_(ext) = 1.1 V` , no flow of `e^0` or current occurs

C

If `E_(ext) gt 1.1 V , e^(-)` flows from Cu to Zn

D

If `E_(ext) lt 1.1` V , Zn dissolves at anode and Cu deposits at cathode

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The correct Answer is:
A
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The most pupular electrochemical cell, daniel cell was originally developed by the English chemist john F daniel the general assembly of the cell is as given below An undergraduate student made a Daniel cell using 100cm^(3) of 0.100MCuSO_(4) ad 0.100M ZnSO_(4) solution respectively. The two compartments are connected by suitable salt bridge. [given E_((Cu^(2+)//Cu))^(@)=0.34V,E_((Zn^(2+)//Zn))=-0.76V,(2.30RT)/(F)=0.06,log2=0.3] Q. Calculate the emf (in volt) of the above cell.

Why blue colour of CuSO_(4) solution gets discharged when zinc rod is dipped in it ? Given, E_(Cu^(+2)//Cu)^(@)=0.34 V and E_(Zn^(+2)//Zn)^(@)=-0.76V

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^(+)// 1/2H_(2)) = 0.00V

E^(c-)._(red) of different half cell are given as : E^(c-)._(Cu^(2+)|Cu)=0.34V,E^(c-)._(Zn^(2+)|Zn)=-0.76V . E^(c-)._(Ag^(o+)|Ag)=0.80 V, E^(c-)._(Mg^(2+)|Mg)=-2.37V. In which cell DeltaG^(c-) is most negative ?

Which of the following statements is correct? If E_(Cu^(2+)|Cu)^(@)=0.34V, E_(Sn^(2+)|Sn)^(@)=-0.136V,E_(H^+|H_2)^(@)=-0.0V

E^(@) (SRP) of different half cell given {:(E_(Cu^(2+)//Cu)^(@) =0.34"volt",,,E_(Zn^(2+)//Zn)^(@) =- 0.76"volt"),(E_(Ag^(+)//Ag)^(@) = 0.8"volt",,,E_(Mg^(2+)//Mg)^(@) =- 2.37 "volt"):} In which cell Delta^(@) is most negative:-

(a) A cell is prepared by dipping a zinc rod in 1M zinc sulphate solution and a silver electrode in 1M silver nitrate solution. The standard electrode potential given : E^(@)Zn_(2+1//Zn) = -0.76V, E^(@)A_(g+//)A_(g) = +0.80V What is the effect of increase in concentration of Zn^(2+) " on the " E_(cell) ? (b) Write the products of electrolysis of aqueous solution of NaCI with platinum electrodes. (c) Calculate e.m.f. of the following cell at 298 K: "Ni(s)"//"Ni"^(2+)(0.01M)////"Cu"^(2+)(0.1M)//"Cu(s)" ["Given"E_(Ni2+//Ni)^(@) = -0.025 V E_(Cu2+//Cu)^(@) = +0.34V] Write the overall cell reaction.

A conventional method of representing Daniell cell is: Zn(s), Zn^(2+) (aq)(1M)"||"Cu^(2+) (aq)(1M), Cu(s) (i) Draw a diagram of the cell and mark anode and cathode. Cu^(2+)//Cu=0.34V, Zn^(2+)//Zn = -0.76V (ii) Give the net reaction as current is drawn. (iii) What is the cell potential at 298 K?

For the galvanic cell Mg(s)|Mg^(2+)(aq)||Zn^(2+)(aq)|Zn(s) ,the standard free energy change is ( Given:E_((mg^(2+))/(mg))^@= -2.36 V,E_((Zn^(2+))/(Zn))^@= -0.76 V)

Which is/are correct among the following? Given the half cell EMFs E_(Cu^(2+)//Cu)^(@)=0.337V, E_(Cu^(+)|Cu)^(@)=0.521V

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