Question

What is the cell potential for the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 79 ∘C when [Fe2+]= 3.20 M and [Mg2+]= 0.310 M .

Answer #1

anode reaction: oxidation takes place

Mg(s) -------------------------> Mg+2 (aq) + 2e-
, E^{0}_{Mg+2/Mg} = - 2.38 V

cathode reaction : reduction takes palce

Fe+2(aq) + 2e- -----------------------------> Fe(s) ,
E^{0}_{Fe+2/Fe} = -0.44V

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

net reaction: Mg(s) +Fe+2(aq) -------------------------> Mg+2 (aq) + Fe(s)

E^{0}_{cell}= E^{0}_{cathode}-
E^{0}_{anode}

E^{0}_{cell}= E^{0}_{Fe+2/Fe} -
E^{0}_{Mg+2/Mg}

= -0.44 - (-2.38)

= 1.94 V

nernest equation

Ecell = E^{0}_{cell} -(0.0591/n)* log
[Mg+2]/[Fe+2]

Ecell = 1.94 - (0.059 x1/2) *log (0.310 / 3.20 }

Ecell = 1.97 V

**cell potential =Ecell = 1.97 V**

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Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 83 ∘C when [Fe2+]= 3.30 M and
[Mg2+]= 0.310 M .

What is the cell potential for the reaction
Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)
at 85 ∘C when [Fe2+]= 3.50 M and [Mg2+]= 0.110
M .

Consider the reaction
Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)
at 79 ∘C , where [Fe2+]= 3.30 M and [Mg2+]= 0.310
M .
Part A
What is the value for the reaction quotient, Q, for the
cell?
Part B
What is the value for the temperature, T, in
kelvins?
Express your answer to three significant figures and include the
appropriate units.
Part C
What is the value for n?
Express your answer as an integer and include the appropriate
units (i.e. enter mol for moles).
Part...

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Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 47 ∘C when [Fe2+]= 3.10 M and
[Mg2+]= 0.110 MM . Express the potential numerically in volts.

What is the cell potential for the reaction
Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)
at 75 ∘C when [Fe2+]= 3.10 M and [Mg2+]= 0.110
M .
Express your answer to three significant figures and include the
appropriate units.

Consider the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 69 ∘C ,
where [Fe2+]= 3.20 M and [Mg2+]= 0.110 M .
Part A:What is the value for the reaction quotient, Q,
for the cell?
Express your answer numerically.
Part B:What is the value for the temperature, T, in
kelvins?
Express your answer to three significant figures and
include the appropriate units.
Part C:What is the value for n?
Express your answer as an integer and include the
appropriate units (i.e. enter mol for moles)....

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Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)
at 65 ∘C , where [Fe2+]= 3.40 M and [Mg2+]= 0.110 M .
Part A
What is the value for the reaction quotient, Q, for the cell?
Part B
What is the value for the temperature, T, in
kelvins?
Part C
What is the value for n?
Part D
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Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)

Consider the reaction
Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 69 ∘C , where [Fe2+]= 3.00
M and [Mg2+]= 0.210 M .
Part A
What is the value for the reaction quotient, Q, for the
cell?
Part B
What is the value for the temperature, T, in
kelvins?
Part C
What is the value for n?
Part D
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Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)
Part E
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what is the cell potential at 25 ∘C if the concentrations are
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A. What is the value for the reaction quotient, Q, for the
cell?
B. What is the value for the temperature, T, in kelvins? What is
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C. Calculate the cell potential.

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Mg(s)+Fe2+(aq)?Mg2+(aq)+Fe(s) at
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a)What is the value for
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b)What is the value for the temperature, T, in
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c)What is the value for
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Express your answer as an integer and include the appropriate
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