OCR A Jun 2009 Paper 1 Q3

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3 Calcium carbonate, CaCO3, reacts with hydrochloric acid as shown in the equation below. CaCO3(s) + 2HCl (aq) CaCl 2(aq) + H2O(l) + CO2(g) (a) 7.50103 mol CaCO3 reacts with 0.200 mol dm3 HCl. (i) Calculate the volume, in cm3, of 0.200 mol dm3 HCl required to react with 7.50103 mol CaCO3. (ii) Calculate the volume, in cm3, of CO2 formed at room temperature and pressure. answer =cm3 [2] answer =cm3 [1] (b) When heated strongly, CaCO3 decomposes. Write an equation, including state symbols, for the thermal decomposition of CaCO3.[2] (c) Calcium oxide reacts with water and with nitric acid. State the formula of the calcium compound formed when: (i) calcium oxide reacts with water,[1] (ii) calcium oxide reacts with nitric acid.[1] [Total: 7]OCR 2009<br /> BLANK PAGE PLEASE DO NOT WRITE ON THIS PAGE TURN OVER FOR QUESTION 4OCR 2009 Turn over<br />

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