Question

The electrochemical equivalent of magnesium is 0.126 mg/C. A current of 5 A is passed in a suitable solution for 1 hour. The mass of magnesium deposited will be:

• A. 0.0378 g
• B. 0.227 g
• C. 0.378 g
• D. 2.27 g

Hint:

The mass of a substance deposited during electrolysis is proportional to the current and time.

Answer 1

The Correct Option is C

Step 1: Use the formula for electrochemical deposition.
The mass deposited is given by: \[ m = Z \times I \times t \] where \( Z \) is the electrochemical equivalent, \( I \) is the current, and \( t \) is the time.
Step 2: Calculate the mass.
Substitute the values: \[ m = 0.126 \times 5 \times 3600 = 0.378 \, \text{g} \]
Final Answer: \[ \boxed{0.378 \, \text{g}} \]