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30/09/2021 6:22 pm
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Explain giving equation, what happens when:
(a) ZnCO3 is heated in the absence of air?
(b) a mixture of CU2O and CU2S is heated?
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30/09/2021 6:25 pm
(a) When zinc carbonate is heated strongly in the absence of air, it decomposes to form zinc oxide and carbon dioxide.
ZnCO3(s) + Calcination → ZnO(s) + CO2(g)
(b) When copper (I) oxide reacts with copper (I) sulphide, it forms copper metal and sulphur dioxide.
2Cu2O(s) + Cu2S(s) + Heat → 6Cu(s) + SO2(g)