Counting Electrons in Electrical Current

• Current

  • Current (A) = electric Charge (C) / time (s)
  • Farraday Constant, F = 96,485.31 C / mol e-
  • # mol e- = Current (A) x time (s) / 96,485.31 C

Example 21.15. One of the half reactions occurring in the lead storage batteries in automobiles is

Pb(s) + HSO4-(aq) + H2O(l) ? PbSO4(s) + H3O+(aq) + 2e-

If a batter delivers 1.5A, and if its lead electrode contains 427g of lead, how long can curren flow before the lead in the elecrode is consumed?

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