Edexcel Jan 2017 (IAL) Paper 5 Q19

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19 A titration experiment was used to find the percentage of iron in iron tablets. The volumes used and measurement uncertainty for each reading of the burette and pipette are shown. Apparatus burette pipette Volume used /cm3 21.80 25.0 Measurement uncertainty / cm3 0.05 0.06 What are the total percentage uncertainties, to 2 decimal places? Total percentage uncertainty on volume measured by burette Total percentage uncertainty on volume measured by pipette 0.23 0.23 0.46 0.46 0.24 0.48 0.24 0.48 20 Sulfuryl chloride, SO2Cl2, reacts with water to give a mixture of sulfuric acid, H2SO4, and hydrochloric acid, HCl. (Total for Question 19 = 1 mark) How many moles of sodium hydroxide, NaOH, are needed to neutralise the solution formed by adding 1 mol of sulfuryl chloride to excess water? A 1 B 2 C 3 D 4 (Total for Question 20 = 1 mark) TOTAL FOR SECTION A = 20 MARKS *P48373A0832* D O N O T W R I T E I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A<br />

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