This assignment will be done in groups of two. You can choose whoever you wish in your class to be your partner. You will submit one assignment per group. The scores assigned on the assignment once it is marked will be allocated to individuals in the group. Please ensure that you both participate equally. The assignment is due on the 5th of February 2021. Q1 Q2 Q3 The oxidation of iodide ion by peroxydisulfate ion is described by the equation, 3I- (aq) + S2O82- (aq) → I3- (aq) + 2SO42- If ⁄ = 1.5 and formation of and -3 mol. dm-3 s-1, what is the rate of consumption of I- ? [6] The equilibrium concentrations in a gas mixture at a particular temperature are 0.13 mol. dm-3 H2, 0.70 mol. dm-3 I2, and 2.1 mol. dm-3 HI. What equilibrium concentrations are obtained at the same temperature when 0.20 mol of HI is injected into an empty container? [12] A 1.268 g sample of a metal carbonate MCO3 was treated with 100.00 cm3 of 0.1083 mol. dm-3 H2SO4, yielding CO2 gas and an aqueous solution of the metal sulphate. The solution was boiled remove all the dissolved CO2 and was the titrated with 0.1241 mol. dm-3 NaOH. A 71.02 cm3 volume of NaOH was required to neutralize the excess H2SO4. Q3.1 What is the identity of the metal M? Q3.2 How many litres of were produced if the density of CO2 is 1.799 g cm-3? Q4 [12] [5] Formic acid is an organic acid secreted by ants and stinging nettles. Calculate the pH and concentrations of all species present in a 0.200 mol. dm-3 HCO2H with the Ka = 1.8 10-4. [12] Q5 A 7.0 wt% solution of H3PO4 in water has a density of 1.0353 g cm-3. Calculate the pH and concentrations of H2PO4-, H3O+ and OH- in the solution, Ka = 7.5 10-3.