Chapter 20, Problem 89c
(c) What process occurs at the anode in the electrolysis of molten NaCl?
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(b) Can the “fuel” of a fuel cell be a solid?
Iron corrodes to produce rust, Fe2O3, but other corrosion products that can form are Fe(O)(OH), iron oxyhydroxide, and magnetite, Fe3O4. (a) What is the oxidation number of Fe in iron oxyhydroxide, assuming oxygen's oxidation number is -2?
Copper corrodes to cuprous oxide, Cu2O, or cupric oxide, CuO, depending on environmental conditions. (a) What is the oxidation state of copper in cuprous oxide?
(d) Why is sodium metal not obtained when an aqueous solution of NaCl undergoes electrolysis?
(d) Why are active metals such as Al obtained by electrolysis using molten salts rather than aqueous solutions?
(a) A Cr3+1aq2 solution is electrolyzed, using a current of 7.60 A. What mass of Cr(s) is plated out after 2.00 days?