At 298   K , the standard reduction potential for Cu 2 + / Cu electrode is 0 . 34   V . Given : K sp Cu ( OH ) 2 = 1 × 10 - 20 Take 2 . 303 RT F = 0 . 059   V The reduction potential at pH = 14 for the above couple is ( - ) x × 10 - 2   V . The value of x is

Question

At 298 &#160; K , the standard reduction potential for Cu 2 + / Cu electrode is 0 . 34 &#160; V . Given : K sp Cu ( OH ) 2 = 1 &#215; 10 - 20 Take 2 . 303 RT F = 0 . 059 &#160; V The reduction potential at pH = 14 for the above couple is ( - ) x &#215; 10 - 2 &#160; V . The value of x is

Aicharya · Accepted Answer

For the reaction: Cu 2 + aq + 2 e - &#8594; Cu s The reduction potential is E = E &#959; - RT 2 F ln 1 Cu 2 + From the given data pH &#160; = &#160; 14 and K sp = Cu OH 2 = 1 .0 &#215; 10 - 20 , we get H + = 10 - 14 M , OH - = K W H + = 10 - 14 M 2 10 - 14 M = 1 M Cu 2 + = K sp OH - 2 = 1 .0 &#215; 10 - 20 M 2 1 M = 1 .0 &#215; 10 - 20 M E =0.34 V - 0 .059 V 2 log 1 1 .0 &#215; 10 - 20 = 0 .34 V - 0 .059 &#215; 20 V 2 E = 0 . 34 - 0 . 59 &#160; = - 0 . 25 &#160; V

At 298   K , the standard reduction potential for Cu 2 + / Cu electrode is 0 . 34   V . Given : K…

Solution

At 298 &#160; K , the standard reduction potential for Cu 2 + / Cu electrode is 0 . 34 &#160; V . Given : K…

Solution

At 298 K , the standard reduction potential for Cu 2 + / Cu electrode is 0 . 34 V . Given : K…