A-LevelChemistryAtoms, molecules and stoichiometryFeb/Mar 2019Paper 3 Q110 Marks
Several ores of copper contain both copper(II) carbonate and copper(II) hydroxide. This combination is called basic copper(II) carbonate. You will determine the composition of an ore of copper by reacting it with an excess of acid and collecting the gas evolved. CuCO3(s) + H₂SO₄(aq) → CuSO4(aq) + H2O(l) + CO2(g) FA 1 is a sample of basic copper(II) carbonate. FA 2 is dilute sulfuric acid, H2SO4. The formula of basic copper(II) carbonate, FA 1, can be written as xCuCO3•yCu(OH)2. You will use your results to determine the ratio x: y in the formula.
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