metals in the order in which they displace each other from the solution of their salts. Al, Cu, Fe, Mg and Zn. . Given the standard electrode potentials, K + /K = – .93V, Ag + /Ag = .80V, Hg + /Hg = .79V Mg + /Mg = – .
V, Cr + /Cr = – .74V Arrange these metals in their increasing order of reducing power. . Depict the galvanic cell in which the reaction Zn(s)+2Ag + (aq) ® Zn + (aq)+2Ag(s) takes place. Further show: (i) Which of the electrode is negatively charged?
(ii) The carriers of the current in the cell. (iii) Individual reaction at each electrode. . Calculate the standard cell potentials of galvanic cell in which the following reactions take place: (i) 2Cr(s) + 3Cd + (aq) ® 2Cr + (aq) + 3Cd (ii) Fe + (aq) + Ag + (aq) ® Fe + (aq) + Ag(s) Calculate the D r G o and equilibrium constant of the reactions.
. Write the Nernst equation and emf of the following cells at K: (i) Mg(s)|Mg + ( .001M)||Cu + ( . M)|Cu(s) (ii) Fe(s)|Fe + ( .001M)||H + (1M)|H (g)(1bar)| Pt(s) (iii) Sn(s)|Sn + ( . M)||H + ( .
M)|H (g) ( bar)|Pt(s) (iv) Pt(s)|Br – ( . M)|Br (l )||H + ( . M)| H (g) ( bar)|Pt(s). .
In the button cells widely used in watches and other devices the following reaction takes place: Zn(s) + Ag O(s) + H O( l ) ® Zn + (aq) + 2Ag(s) + 2OH – (aq) Determine D r G o and E o for the reaction. . Define conductivity and molar conductivity for the solution of an electrolyte. Discuss their variation with concentration.
. The conductivity of . M solution of KCl at K is . S cm – .
Calculate its molar conductivity. . The resistance of a conductivity cell containing .001M KCl solution at K is W . What is the cell constant if conductivity of .001M KCl solution at K is .