AQA Jan 2011 Paper 1 Q3

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do not write outside the box a an unknown metal carbonate reacts with hydrochloric acid according to the following equation m co aq hcl aq mcl aq co g h o l a g sample of m co was dissolved in distilled water to make cm of solution a cm portion of this solution required cm of mol dm hydrochloric acid for complete reaction a i calculate the amount in moles of hcl in cm of mol dm hydrochloric acid give your answer to significant figures mark a ii calculate the amount in moles of m co that reacted with this amount of hcl give your answer to significant figures mark a iii calculate the amount in moles of m co in the g sample give your answer to significant figures mark a iv calculate the relative formula mass mr of m co give your answer to decimal place mark a v hence determine the relative atomic mass ar of the metal m and deduce its identity ar of m identity of m marks wmp jan chem do not write outside the box b in another experiment mol of co was produced this gas occupied a volume of m at a pressure of kpa calculate the temperature of this co and state the units the gas constant r j k mol marks c suggest one possible danger when a metal carbonate is reacted with an acid in a sealed flask mark d in a different experiment g of magnesium carbonate were added to an excess of sulfuric acid the following reaction occurred mgco h so mgso co h o d i calculate the amount in moles of mgco in g of magnesium carbonate marks d ii calculate the mass of mgso produced in this reaction assuming a yield marks turn over wmp jan chem

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