Calculate the standard potential, E^{\circ}, for this reaction from its

Annette Sabin

Annette Sabin

Answered question

2022-01-17

Calculate the standard potential, E, for this reaction from its G value.
X(s)+Y3+(aq)X3+(aq)+Y(s)
?=28.0 kJ

Answer & Explanation

jgardner33v4

jgardner33v4

Beginner2022-01-18Added 35 answers

Step 1
E and G are related as ÷
G=n F E
where n is no. of electrons transferred.
Step 2
Given, G=28.0kj
E=?
x+y3+x3++y
Reaction at anade :
xx3++3e
n=3
G=n F E
E=Gn F
=(28.0)kJ3×96500C
=9.67×105kJc
=9.67×105×103Jc=0.0967V
Answer: 0.0967V
Samantha Brown

Samantha Brown

Beginner2022-01-19Added 35 answers

Step 1
The reaction given is
X(s)+Y4+(aq)X4+(aq)+Y(s)
In the above balanced reaction, 1 molecule of X (s) is being oxidised from 0  4+ oxidation state.
Hence there are total 4 electrons required for the oxidation of X (s) from 0  4+.
Hence in the reaction, total 4 electrons are transferred.
Step 2
The relationship between the Ecell0 and G0 is given by
nFEcell0=G0
where n=number of electrons transferred in the reaction=4
F=Faraday's constant=96500C
and G0=91.0KJ=91000J (since 1KJ=1000J)
Hence substituting the values we get
4×96500×Ecell0=91000
Ecell0=0.23575V 

alenahelenash

alenahelenash

Expert2022-01-23Added 556 answers

Answer: 0.124 V Explanation: X(s)+Y4+(aq)X4+(aq)+Y(s) To calculate standard Gibbs free energy, we use the equation: G=n F Ecello Where, n=number of electrons transferred=4 F=Faradays constant=96500C Ecello=standard cell potential=? Putting values in above equation, we get: 48.0×1000=4×96500×Ecello Ecello=0.124 Thus the standard potential E, for this reaction is 0.124 V

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