Question

Predict the half-cell reactions that occur when aqueous solutions of the following salts are electrolyzed in a cell with inert electrodes. What is the overall cell reaction in each case?

Part A anode reaction for LiBr Express your answer as a ionic equation. Identify all of the phases in your answer. 2Br−(aq)→Br2(l)+2e− Part B cathode reaction for LiBr: Express your answer as a ionic equation. Identify all of the phases in your answer. 2H2O(l)+2e−→H2(g)+2OH−(aq)

This is where I need help!

Part c: anode reaction for Na2SO4 Express your answer as a ionic equation. Identify all of the phases in your answer. 2H2O(l)+2e−→H2(g)+2OH−(aq) SubmitMy AnswersGive Up Incorrect; Try Again; 5 attempts remaining

Part d:cathode reaction for Na2SO4 Express your answer as a ionic equation. Identify all of the phases in your answer.

Part e: overall cell reaction Na2SO4 Express your answer as a ionic equation. Identify all of the phases in your answer.

Answer 1

Part A anode reaction for LiBr

2Br-(aq) ---> Br2(l)+ 2e-

Part B cathode reaction for LiBr:

2H2O(l)+2e- ---> H2(g)+2OH-(aq)

part C overall cell reaction for LiBr:

2Br-(aq) ---> Br2(l)+ 2e-

2H2O(l)+2e- ---> H2(g)+2OH-(aq)
-------------------------------------------
2Br-(aq)+2H2O(l) ---> Br2(l)+H2(g)+2OH-(aq)
--------------------------------------------

Part D anode reaction for Na2SO4:

2H2O(l) -----> o2(g) + 4H^+(aq) + 4e-

part E cathode reaction for Na2SO4:

2H2O(l)+2e- ---> H2(g)+2OH-(aq)

Part F overall cell reaction for Na2SO4:

2H2O(l) -----> o2(g) + 4H^+(aq) + 4e-

(2H2O(l)+2e- ---> H2(g)+2OH-(aq))*2

-------------------------------------------
2H2O(l) -----> o2(g) + 2H2(g)

----------------------------------------------------