Please answer and explain these questions: 37. Which reaction correctly describe

ID: 961894 • Letter: P

Question

Please answer and explain these questions:

37. Which reaction correctly describes the electro-chemical cell shown?

a. Cu2+ (aq) + 2Ag+ (aq) à Cu (s) + 2Ag (s)

b. Cu(s) + 2Ag (s) à Cu2+ (aq) + 2Ag+ (aq)

c. Cu2+ (aq) + 2Ag (s) à Cu (s) + 2Ag+ (aq)

d. Cu(s) + 2Ag+ (aq) à Cu2+ (aq) + 2Ag (s)

38. What voltage will be produced by the electrochemical cell described in the problem above?

a. +1.14 V b. +0.46 V c. +1.48 V d. -1.14 V e. -0.46 V

39. Which description of the cell in question 37 is correct?

a. e’s flow from the Cu cathode to the Ag anode and K+ ions diffuse into the AgNO3 solution.

b. e’s flow from the Cu cathode to the Ag anode and K+ ions diffuse into the Cu(NO3)2 solution.

c. e’s flow from the Cu anode to the Ag cathode and K+ ions diffuse into the Cu(NO3)2 solution.

d. e’s flow from the Cu anode to the Ag cathode and K+ ions diffuse into the AgNO3 solution.

Cu 1.0M Cu NO3)2 1.0M AgNO2

Cu ---> Cu+2 +2e- ( oxidation) E0= -0.34V , 2Ag+2e- ---> 2Ag ( Reduction) Eo= 0.80V

Addition of these reactions give Cu +2Ag+---> Cu+2 + 2Ag ( D is correct)

cell potential = -0.34+0.80= 0.46V

e’s flow from the Cu cathode to the Ag anode and K+ ions diffuse into the Cu(NO3)2 solution.( b is correct)