When one coulomb of electricity is passed through an electrolytic solution, the mass of the element deposited on the electrode is equal to

Options

A. Molecular weight
B. equivalent weight
C. one gram
D. Electrochemical equivalent

Answer

To solve the question regarding the mass of the element deposited on the electrode when one coulomb of electricity is passed through an electrolytic solution, we can follow these steps:

### Step 1: Understand the Concept of Electrochemical Equivalent
Electrochemical equivalent (Z) is defined as the mass of a substance deposited or liberated at an electrode when one coulomb of electric charge is passed through the electrolyte. It is a key concept in electrochemistry.

### Step 2: Use the Formula for Electrochemical Equivalent
The electrochemical equivalent can be expressed mathematically as:
\[ Z = \frac{m}{Q} \]
where:
- \( Z \) = electrochemical equivalent (in grams per coulomb)
- \( m \) = mass of the substance deposited (in grams)
- \( Q \) = total electric charge passed (in coulombs)

### Step 3: Substitute the Known Values
In this case, we are given that \( Q = 1 \) coulomb. Therefore, the mass of the element deposited (m) when one coulomb of electricity is passed through the solution can be expressed as:
\[ m = Z \times Q \]
Substituting \( Q = 1 \):
\[ m = Z \times 1 = Z \]

### Step 4: Conclusion
Thus, when one coulomb of electricity is passed through an electrolytic solution, the mass of the element deposited on the electrode is equal to the electrochemical equivalent (Z).

### Final Answer
The mass of the element deposited on the electrode is equal to the electrochemical equivalent (Z).

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