Question

In: Chemistry

If delta rG for the following reaction is -1880 kJ, calculate Ecell. How many electrons are...

If delta rG for the following reaction is -1880 kJ, calculate Ecell. How many electrons are transferred in this equation?

2MnO4- (aq) + 5Fe (s) + 16H+ (aq) ----> 2 Mn2+ (aq) + 5 Fe2+ (aq) +8H20 (l)

(I am trying to find n electrons in order to plug into the equation: Ecell=DeltaG/nF)

Solutions

Expert Solution

Oxidation number of each element in MnO4-1 is

O=-2

Mn=+7

Oxidation number of each element in Fe is

Fe=0

Oxidation number of each element in Mn+2 is

Mn=+2

Oxidation number of each element in Fe+2 is

Fe=+2

Oxidation number of each element in reactant is

O=-2

Mn=+7

Fe=0

Oxidation number of each element in product is

Mn=+2

Fe=+2

Mn in MnO4- has oxidation state of +7

Mn in Mn+2 has oxidation state of +2

So, Mn in MnO4- is reduced to Mn+2

Number of electron transferred per Mn = 5

there are 2 Mn.

So, number of electron = 10

Fe in Fe has oxidation state of 0

Fe in Fe+2 has oxidation state of +2

So, Fe in Fe is oxidised to Fe+2

Number of electron transferred per Fe = 2

there are 5 Fe.

So, number of electron = 10

Either way we can find out the number of electrons

It is 10

queen_honey_blossom answered 3 years ago
Next > < Previous

Related Solutions

Calculate the values of Delta G and Ecell for the following reaction, label the half reactions...
Calculate the values of Delta G and Ecell for the following reaction, label the half reactions as anode and cathode. 2Ag(s) + Cu2+ (aq) > 2 Ag+ (aq) + Cu(s) * My main question lies in which is cathode and anode...it seems that the Ag half reaction (2Ag(s) > 2Ag+ +2e-) signifies Ag(s) loosing electrons causing the positive reactant, this leads me to think loss of electrons/this is the oxidation half reaction, therefore Ag(s) is the reduction agent and anode...
Calculate q (heat) for the Mg/HCl reaction in units of kj. Calculate delta H in units...
Calculate q (heat) for the Mg/HCl reaction in units of kj. Calculate delta H in units of kj/mol. Will q be positive or negative ? Why ? Please explain why it is positive or negative because I am very confused about the rules regarding the value of q and telling whether if it will be positive or negative based on the inital and final temperatures given. Thank you. Given : Final Temp- 32.2 celscius Intinial temp- 21.3 c= 3.93 j/g...
What is the delta H of the following reaction of methane and ammonia in kJ/mole?
What is the delta H of the following reaction of methane and ammonia in kJ/mole?CH4 (g) + NH3 (g) -----> HCN (g) + 3H2 (g) Delta H rxn = ? kJ / moleNote, this is at a temperature different than the standard tables so you can't use those to solve this. Use the following reaction enthalpy data.N2 (g) + 3 H2 (g) ---> 2 NH3(g). Delta H = -101.8 kJ/moleC (s) + 2 H2 (g) ---> CH4 (g) Delta H...
Consider the following reaction at 298 K: C(graphite)+2CL(g)------> CCl4(l) delta H=-139 kj Calculate delta S sys...
Consider the following reaction at 298 K: C(graphite)+2CL(g)------> CCl4(l) delta H=-139 kj Calculate delta S sys delta S surr delta S univ
Please show work: How many electrons are transferred in the following redox reaction when it is...
Please show work: How many electrons are transferred in the following redox reaction when it is balanced with the smallest possible integer coefficients? MnO4–(aq) + NH4+(aq) → Mn(OH)2(s) + N2H4(aq) (basic solution) [Note that H2O(l) and OH–(aq) may have to be added where necessary to balance the equation.]
Calculate the change of enthalpy for: 4S + 6O2= 4SO3 Delta H= ___ kJ
Calculate the change of enthalpy for: 4S + 6O2= 4SO3 Delta H= ___ kJ
Calculate the Ecell value at 298K for the cell based on the reaction Fe3+(aq)+ Cr2+(aq) -->...
Calculate the Ecell value at 298K for the cell based on the reaction Fe3+(aq)+ Cr2+(aq) --> Fe2+(aq)+Cr3+(aq) when [Fe3+] = [Cr2+] = 1.50x10-3 M and [Fe2+]= [Cr3+] = 2.5x10-4 M?
Atom of an element has 55 electrons; calculate how many electrons does it have at its outer shell.
Atom of an element has 55 electrons; calculate how many electrons does it have at its outer shell. Show electronic configuration of the element.
The ΔG°\' of the reaction is -7.050 kJ ·mol–1. Calculate the equilibrium constant for the reaction....
The ΔG°\' of the reaction is -7.050 kJ ·mol–1. Calculate the equilibrium constant for the reaction. (Assume a temperature of 25° C.What is ΔG at body temperature (37.0° C) if the concentration of A is 1.8 M and the concentration of B is 0.75 M?
How many electrons does a neutral potassium atom have? How many protons? How many electrons does...
How many electrons does a neutral potassium atom have? How many protons? How many electrons does a neutral fluorine atom have? What happens in the molecule of potassium fluoride?
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT