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Ch.19 - Electrochemistry

Chapter 19, Problem 40a

Porous pellets of TiO2 can be reduced to titanium metal at the cathode of an electrochemical cell containing molten CaCl2 as the electrolyte. When the TiO2 is reduced, the O2-ions dis-solve in the CaCl2 and are subsequently oxidized to O2 gas at the anode. This approach may be the basis for a less expensive process than the one currently used for producing titanium.

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(a) Label the anode and cathode, and indicate the signs of the electrodes.

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