Answer to Question #119534 in Inorganic Chemistry for Isha singh

Question

Consider the following half reactions and their standard reduction potential values to answer the following questions.

Cu2+ (aq) + e- Cu+ (aq)​E° = 0.15 V
Br2 (l) + 2e- 2Br- (aq) ​E° = 1.08 V

i) State which reaction occurs at the anode and which at the cathode.​ [2 marks]
ii) Write the overall cell reaction.​ [2 marks]
iii) Calculate the value of E°cell.​ [2 marks]
iv) Calculate the value ΔG°​ [2 marks]
v) What is the value of Kc at 25°C?

Answer 1

i) 1 - cathode, 2 - anode

ii) 2Cu⁺ + Br2 (l) =  2Br- (aq) + 2Cu2+ (aq)

iii) 0,93

iv) -0,93

v) 1,46