The unit of electrochemical equivalent is-a)Gm ampere-1b)Gm/coulombc)Gm-ampered)Coulomb/gramCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Answer

Z = w/it
w in gm
it in columb.
so z = gm/columb

Answer

Z = w/it
w in gm
it in columb.
so z = gm/columb

Answer

The unit of electrochemical equivalent is Gm/coulomb. Let's break down the answer and understand it in detail.

What is electrochemical equivalent?
Electrochemical equivalent is a term used in electrochemistry to describe the amount of substance (usually an element or compound) that is deposited or evolved at an electrode during an electrochemical reaction, per unit of electric charge passed through the cell.

Unit of electrochemical equivalent:
The unit of electrochemical equivalent is Gm/coulomb. Let's understand what this unit means.

1. Coulomb (C):
The coulomb is the unit of electric charge. It is defined as the amount of electric charge carried by a current of one ampere flowing for one second. It is represented by the symbol C.

2. Gm (Gram):
Gram is a unit of mass in the metric system. It is equal to one thousandth of a kilogram (0.001 kg). The symbol for gram is 'g'.

3. Gm/coulomb:
This unit represents the amount of mass (in grams) that is deposited or evolved at an electrode per unit of electric charge (in coulombs) passed through the cell. It indicates the efficiency of the electrochemical reaction in converting electrical energy into chemical change.

Significance of the unit:
The electrochemical equivalent is a fundamental quantity in electrochemistry as it helps in quantifying the relationship between electrical energy and chemical change. It allows us to calculate the amount of substance involved in an electrochemical reaction based on the amount of charge passed through the cell.

Example:
Suppose we have a copper electroplating cell where a current of 2 amperes is passed for 1 hour. The electrochemical equivalent of copper is approximately 0.329 Gm/C. Using this value, we can calculate the amount of copper deposited on the electrode by multiplying the current (in coulombs) by the electrochemical equivalent (in Gm/C).

Amount of copper deposited = 2 A * 3600 s * 0.329 Gm/C = 2354.4 Gm

Hence, the unit of electrochemical equivalent is Gm/C (grams per coulomb).

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