Question

14. Which of the following ions can be reduced by tin metal in aqueous solution?

            A.   Mg²⁺              B.   Na⁺            C.   Ag⁺            D.    Zn²⁺        E.   Mn²⁺

15. Which of the following ions can be reduced by copper metal in aqueous solution?

            A.   Mg²⁺              B.   Na⁺            C.   Ag⁺            D.    Zn²⁺        E.   Mn²⁺

Answer 1

14) C.   Ag+ E⁰ of Ag = 0.80 V

   E⁰ of Sn = -0.14 V

so Sn can reduce Ag⁺

15) C.   Ag+ E⁰ of Ag = 0.80 V

     E⁰ of Cu = 0.34 V

Ag⁺ E⁰ value is more than cu so Cu can reduce Ag⁺