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Unformatted text preview: the oxidant. Lead oxide (which does not dissolve in metals) is added to the alloy; antimony takes oxygen from this oxide by the reaction below. The resulting antimony oxide precipitates out of the solution. Meanwhile, the lead oxide, reduced to lead, dissolves in the alloy. At a temperature of 887C, assuming the thermodynamics of liquid Pb-Sb alloys is adequately described by an ideal solution, estimate the lowest possible antimony concentration that can be attained. 2 Sb ( l ) + 3PbO ( l ) = 3Pb ( l ) + Sb 2 O 3 ( l ) G = 105, 414 17.972 T J mole-1 of Sb 2 O 3 formed...
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- Fall '08