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For the electrochemical cell, Mg(s)|Mg...

For the electrochemical cell,
`Mg(s)|Mg^(2+) (aq. 1M)||Cu^(2+) (aq. 1M)|Cu(s)`
the standard emf of the cell is 2.70 V at 300 K. When the concentration of `Mg^(2+)` is chaged to x M, the cell potential changes to 2.67 V at 300 K. The value of x is ________ .
(Given `F/R=11500 kV^(-1)`. where F is the Faraday constant and R is the gas constant, ln (10) = 2.30)

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Consider an electrochemical cell : Mg_((s))|Mg^(2+)(aq),1M^(2+) ||Cu^(2+)(aq, 1M)|Cu_((s)) the standard emf of the cell is 2.70 V at 300 K. When the concentration of Mg^(2+) is changed to x M, the cell potential changes to 2.67 V at 300 K. The value of x is ________. (GIven, (F)/(R) = 11500KV^(-1) , where F is the Faraday constant and R is the gas constant , In (10= 2.30)

For the electrochemical cell, Mg(s)|Mg^(2+)(aq,1 M)||Cu^(2+)(aq.1 M) Cu(s) , the standard emf of the cell is 2.70 V at 300 K. When the concentration of Mg^(2+) is changed to x M, the cell potential changes to 2.67 V at 300 K. What is the value of x ? (Given, F/R =11500 K V^(-1) ,where F is the Faraday constant and R is the gas constant, the value of "In"_((10))(10)=2.30) .

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Consider an electrochemical cell : A(s)|A^(n+) (aq. 2M)||B^(2n+) (aq. 1M)|B(s) . The value of DeltaH^(@) for the cell reaction is twice that of DeltaG^(@) at 300 K. If the amf of the cell is zero, the DelatS^(@) ("in "JK^(-1) mol^(-1)) of the cell reaction per mole of B formed at 300 K is ______ . (Given : In (2) = 0.7, R (universal gas constant) = 8.3 J K^(-1) mol^(-1) . H, S and G are enthalpy, entropy and Gibbs energy, respectively.)

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