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03 Jul, 2021 02:58 PM

What is produces at each electrode of an aq solution of both NaBr and AgF?

Specifically given the 3 categories - anode, cathode or not produced. Where would the following items fit into each category? H2(g) Br2(l) F2(g) Ag(s) O2(g) Na(s)

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AD
03 Jul, 2021 02:59 PM

I found this very difficult to figure out but the answer is Br2(l) is produced at the anode and Ag at the cathode. the rest is all not produced, can someone please explain why the H2 and O2 are also not produced.

CO
03 Jul, 2021 02:59 PM

Write down all the reductions and oxidations occurring: reduction potentials are in brackets

REDUCTION @ CATHODE

Ag+ + e- ---> Ag   (+0.80V)

2H+ + 2e- ---> H2 (+0.00V)

2Na+ + 2e- ---> 2Na (-2.71V)

OXIDATION @ ANODE

2Br- ---> Br2 + 2e-              (-1.07V)

2H2O----> O2 + 4H+ + 4e- (-1.23V)

2F- ---> F2 + 2e-                 (-2.87V)

Only the reaction with the most positive electrode potential will occur at each electrode.. So only Ag(s) and Br2(l) are formed.

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