PPT Slide
- We want to know how much material we obtain with electrolysis.
- Consider the reduction of Cr 3+ to Cr.
- Cr 3+(aq) + 3e- _ Cr(s).
- 3 mol of electrons will plate 1 mol of Cr.
- The charge of 1 mol of electrons is 96,500 C (1 F).
- Since Q = I x t, the amount of Cu can be calculated from the current (I) and time (t) taken to plate.