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Can any unreacted copper oxide be removed from the mixture?

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In this experiment an insoluble metal oxide is reacted with a dilute acid to form a soluble salt. Copper(II) oxide, a black solid, and colourless dilute sulfuric acid react to produce copper(II) sulfate, giving a characteristic blue colour to the solution. From this solution, blue copper(II) sulfate pentahydrate crystals can be obtained. read more

Best Answer: 1) Heat the mixture to increase the rate of reaction between copper oxide and sulphuric acid: CuO(s) + H2SO4(aq) --> CuSO4(aq) + H2O(l) 2) Filter the mixture to remove unreacted copper oxide. 3) Allow water to slowly evaporate from the solution. read more

a Weigh out 2 g (0.025 mol) of copper(II) oxide and 1.6 g (0.025 mol) of zinc powder. b Mix thoroughly to give a uniformly grey powder. c Pour the mixture in the shape of a ‘sausage’ about 5 cm long onto a clean tin lid sitting on top of a tripod (or onto a strip of ceramic paper, folded lengthwise into a V-shape). read more

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