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Question: Electrochemical equivalent of \(Cu\) in the reaction \(C{u^{ + 2}} + 2{e^ - } \to Cu\) is: A.\(...

Electrochemical equivalent of CuCu in the reaction
Cu+2+2e−→CuC{u^{ + 2}} + 2{e^ - } \to Cu is:
A.63.596.5\dfrac{{63.5}}{{96.5}}
B.63.596500×2\dfrac{{63.5}}{{96500 \times 2}}
C.63.5×296500\dfrac{{63.5 \times 2}}{{96500}}
D.9650063.5×2\dfrac{{96500}}{{63.5 \times 2}}

Explanation

Solution

We have to know that, the electrochemical comparable at times contracted EqEq or ZZ, of a substance component is the mass of that component (in grams) shipped by 11 coulomb of electric charge. What could be compared to a component is estimated with a voltmeter.

Complete answer:
We have to know that, the electrochemical equivalent of a substance is the mass of the substance saved to one of the cathodes when a current of one ampere is passed for one second, for example an amount of power of one coulomb is passed.
We have to know that copper is a substance component with the symbol CuCu and nuclear number 2929. It is a delicate, moldable, and bendable metal with high warm and electrical conductivity.
The equation for discovering electrochemical comparable is as per the following:
Z=MqZ = \dfrac{M}{q}
Where,
MM = The mass of the substance,
qq = the charge passed.
Since,
q=Itq = It
Where,
II = the current applied,
tt = time,
We likewise have,
Z=MItZ = \dfrac{M}{{It}}
If,
q=1q = 1coulomb’s
I=1I = 1ampere
t=1t = 1second.
By using the following expression,
Electrochemical equivalent = Equivalent massF=Z{\text{Electrochemical equivalent = }}\dfrac{{{\text{Equivalent mass}}}}{F} = Z
Here, the equivalent mass of copper has to be first calculated,
Equivalent mass of copper = MolarmassvalencyEquivalent{\text{ mass of copper = }}\dfrac{{Molarmass}}{{valency}}
Where, the molar mass of copper MM is 63.563.5 and the valency is two.
MolarMassvalency=M2=63.52\dfrac{{Molar Mass}}{{valency}} = \dfrac{M}{2} = \dfrac{{63.5}}{2}
Then,
F=96500F = 96500
Applying all the values in the electrochemical equation,
Z=63.52×96500Z = \dfrac{{63.5}}{{2 \times 96500}}

Hence, option (B) is correct.

Note:
We have to know that a newly uncovered surface of unadulterated copper has a pinkish-orange tone. Copper is utilized as a conveyor of warmth and power, as a structure material, and as a constituent of different metal combinations, like authentic silver utilized in gems, cupronickel used to make marine equipment and coins, and constantan utilized in strain checks and thermocouples for temperature estimation.