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In the box below, enter the mass of the weighing vessel and iron-oxalate complex/ g. 1.502 In the box below, enter the mass of the weighing vessel after transfer/ g. 1.031 In the box below, enter the mass of iron-oxalate complex weighed out for analysis/ g. 0.471g In the box below, enter the concentration of the permanganate solution used (should be 0.05 M but may differ)/ M. Assume this number is exact, i.e. known to infinite significant figures. 0.05 In the box below, enter the titre of exactly 0.05 M permanganate solution delivered, to the nearest 0.05 ml. 24.55ml Calculate and enter the amount of permanganate used/mol. 1.228mol Next, calculate the amount of oxalate this permanganate destroyed (you'll need to derive and balance the chemical equation first)/ mol. 3.070mol How many moles of oxalate are there in every mole of complex? Enter your integer value below ('integer' means it has to be a whole number). 1.023mol Hence, calculate and enter the amount of moles of complex weighed out for analysis/ mol. 0.460mol From this value calculate and enter the Relative Molar Mass (RMM) of the complex/ g mol?. 461.76g/mol-1 Calculate and enter the RMM of the KzFe(C2O4)3 unit in the absence of any waters of crystallisation/ g mol?. RAMs: Fe 55.85; K 39.10; C 12.01; 0 16.00; H 1.01. 437.21g/mol-1 Finally, from the discrepancy between the values obtained, calculate and enter the number of water molecules crystallising in the complex (i.e. the value of n in KzFe(C204)3.n(H2O)) Your value need not be an integer. n = 1.36 Enter the number of significant figures applicable to quoting the value of n. Enter an integer. 1 + Synthesis of Iron oxalate complex: Dissolve 15 g of ammonium ferrous sulphate (NH4)2Fe(SO4)26H20 in 50 ml of hot water. 15 g of ammonium ferrous sulphate (NH4)2Fe(SO4)26H20 in 50 ml of hot water. --> 10 g oxalic acid in 100 ml hot water + 100ml water --(heat)--> FeC204'H20 Telecocle 10g of FeC204H2O + 30ml water + yellow ferrous oxalate + 25ml hydrogen peroxide --(heat)--> 1.031 iron- oxalate complex Analysis of complex 0.5g of complex dissolved in 20-30ml dilute sulphuric acid (warmed) and titrated with the standard 0.05 M permanganate (24.55ml) Analysis of complex equation: it in the absence of any waters of crystallisation/ 51 Equation: 16H(+) + 5C204(2-) + 2Mn04(-) --> 2Mn(2+) + H20 + 10CO2 Cacate enter the better 16H(+) + 5 Oxalate + 2 Permanganate --> 2Mn(2+) + H2O + 10C02 oxalate is oxidised to carbon dioxide using permanganate