CHEM 11042 Fundamentals of Chemistry Assessment item 2 Due date: Monday 2nd May 2022 AEST (Weighting: 20% of unit assess

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Chem 11042 Fundamentals Of Chemistry Assessment Item 2 Due Date Monday 2nd May 2022 Aest Weighting 20 Of Unit Assess 1 (94.82 KiB) Viewed 37 times

CHEM 11042 Fundamentals of Chemistry Assessment item 2 Due date: Monday 2nd May 2022 AEST (Weighting: 20% of unit assessment) In completing this assessment Attempt all 4 questions - each question is worth 25 marks each for a total of 100 marks Note that each question has multiple parts. All submissions should be typed and saved as a word document. Show all calculations for part marks Report your answers with correct units where applicable Completed assessment is to be submitted via upload on Moodle page. Question 1: (Week 3 - Topics 8 & 9 of Foundations of Chemistry Study Guide) [25 marks] Since iron is more reactive than copper, it displaces the copper ions from the aqueous solution of copper sulphate. This is called a single displacement reaction of one metal by another metal. To experimentally test this, Joel reacted 0.9845 g of iron fillings with an excess of copper sulphate solution. When the reaction was complete the solution had changed from blue to green and a copper deposit weighing 1.024 g had formed in the solution. In this reaction, metallic iron is converted into ferrous ion (Fe2+) and cupric ion (Cu2) is converted into metallic copper a) Calculate the number of moles of iron used and the number of moles of copper formed (5 marks) b) Calculate the theoretical mass of copper that was expected to be produced and hence determine the percentage yield of Joel's experiment (5 marks) c) How many molecules of iron are present in 0.9845 g of iron fillings? (5 marks) Fiona prepared a solution by dissolving 1.35 g of silver nitrate in a 250 mL volumetric flask and diluting it up to the volume. d) Calculate the molarity of the silver nitrate solution (5 marks) e) What volume of this solution is required to prepare 100 mL of 0.01 M of silver nitrate solution? (5 marks)