Ok, So for an electrolytic cell, where the cathode is negative and the positive

Question

Ok, So for an electrolytic cell, where the cathode is negative and the positive is the anode....... H2SO4 Or sulfuric acid, is used as the the solution, and added to it, are NaCl, NaBr, NaI, NiSO4, CuSO4, and ZnSO4. For each I need the redox reactions taking place in each of these mixtures....For every reaction there was vigourous bubbling at the cathode, and for Cu, and Ni, there was solid deposited at the cathode. Please someone help me, I know the anode is oxidizing, and the cathodes reducing, I just need the half reactions for the H2 gas made and the MEtals, thank you. Even to give me a head start

Explanation / Answer

Cu2+ (aq) + 2e- ----> Cu (s) (gaining electrons at cathode , so being reduced)

Ni2+ (aq) + 2e- ----> Ni(s) (gaining electrons so being reduced at cathode)

H2 ----> 2H+ + 2e- (losing electrons and hence being oxidised at anode)

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