For the exercise in this topic, base your answers on the potentials listed in Table 6M.1 or Appendix 2B, with the exception of the reduction and oxidation of water at pH = 7:

(a) What current is required to produce 8.2 g of chromium metal from chromium(VI) oxide in 24 h?

(b) What current is required to produce 8.2 g of sodium metal from molten sodium chloride in the same period?

Transcribed Image Text:

2 H₂O(1) + 2 e → H₂(g) + 2 OH¯ (aq), E = O₂ (g) + 4H (aq) + 4e¯ 2 H₂O (1), E = -0.42 V at pH = 7 +0.82 V at pH = 7