In electrolysis, if the current is 2 A and the time is 30 minutes, how many mole

Practice Questions

Q1
In electrolysis, if the current is 2 A and the time is 30 minutes, how many moles of electrons are transferred?
  1. 0.1 mol
  2. 0.2 mol
  3. 0.3 mol
  4. 0.4 mol

Questions & Step-by-Step Solutions

In electrolysis, if the current is 2 A and the time is 30 minutes, how many moles of electrons are transferred?
  • Step 1: Identify the given values. The current (I) is 2 A and the time (t) is 30 minutes.
  • Step 2: Convert the time from minutes to seconds. Since 1 minute = 60 seconds, 30 minutes = 30 × 60 = 1800 seconds.
  • Step 3: Use the formula for moles of electrons: moles = (current × time) / (n × F). Here, n = 1 (for electrons) and F = 96500 C/mol.
  • Step 4: Substitute the values into the formula: moles = (2 A × 1800 s) / (1 × 96500 C/mol).
  • Step 5: Calculate the numerator: 2 A × 1800 s = 3600 C.
  • Step 6: Now divide the numerator by F: moles = 3600 C / 96500 C/mol.
  • Step 7: Perform the division to find the number of moles of electrons.
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