a student places Mg electrode in 1 M solution of MgSO4 and in another beaker pla

Question

a student places Mg electrode in 1 M solution of MgSO4 and in another beaker places Cu electrode in 1 M solution of CuSO4. A salt bridge composed of NaCl connects the two beakers . Write balanced electrode and overall cell reactions A student places Mg electrode in 1 M solution of MgSO4 and in another beaker places Cu electrode i M solution of CuSO4. A salt bridge composed of NaCI connects Copp the two beakers. (a) Write balanced electrode and overall cell reactions (b) Determine the voltage across the electrodes (g) Write abbreviated standan cell notation. | Calculate E%ell for a cell that uses Ag/Ag, and Al/AF Calculate E cell for a cell that uses Ag/Agt and AIVAI

Explanation / Answer

a)

the electrodes:

Cu2+ + 2 e Cu(s) +0.337

Mg2+ + 2 e Mg(s) 2.372

so, clearly, Mg oxidizes esily

so

Cu2+ + 2 e Cu(s) E = +0.337

Mg(s)   Mg2+ + 2 e E = 2.372

then

overall

Cu2+ + 2 e + Mg(s)   Cu(s)+ Mg2+ + 2 e

Cu2+ + Mg(s)   Cu(s)+ Mg2+

b)

Voltagee:

if they are standard conditions

then

E°cell = Ered + Eox = 0.337 + 2.372 = 2.709V

c)

abbreviated std. cell notation

ox//reduction

(Mg(s) / Mg2+(aq) ) // (Cu+2(aq) / Cu(s) )

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