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Chemistry 19 Online
OpenStudy (anonymous):

an ore contains a mixture of zinc carbonate and lead carbonate. Zinc and lead are produced from this ore by 2 reactions. REACTION 1: The carbonates in the ore are converted into a mixture of zinc oxide and lead oxide Name this type of reaction. ______________________ How is this reaction done? _______________________ REACTION 2: the metals are mixed with carbon and heated in a furnace to produce zinc and lead Explain why zinc and lead are produced

OpenStudy (anonymous):

The first reaction is calcination ZNCO3 and PbCO3 decompose into oxides respectively. The second reaction is possible as the net change in gibbs free energy is negative hence it is sponatneous.

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