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Hello, i am very much in need for the answers of these questions. kindly please help me out ASAP! For questions : 6 consider an

Hello,
i am very much in need for the answers of these questions.
kindly please help me out ASAP! image text in transcribed
image text in transcribed
For questions : 6 consider an electrochembical cell containiet a copper-eopper solfate relerrnce electrode drpped in as atalyes containing iron (II) and tron (III) m25C. The working eloctrode has a Ft wire atached to the volumetit. The cell noutice for this: system is: 1. (0.5 marks) Write the expression for the equiliterum constant K for the redoctiba of iron (III) to lifot (ti) 2. ( 0.5marks) Foc the cell described in QI write an equation to calculate Equsey in terms of the conccetrations of ison (III) and iron (III) asing the Nermst equation. Assume the iemperature is 25C. 3. (2 maks) What is Bahwwe for a sulver-silver chloride electrode and a copper-copper sul fixe electrode? Aspume conccatrations of filling solutions are IM. E' for a silver isilyer chloride electrode is 0.197V. (Hint Stat from the Nersst equation to ahow your: work, you may need to look-up values online). 4. ( 2 marks) Uec yoar answers to questions 2 and 3 to write an expeesion for Poin for the clectochemical cell deserithed in the preamble-Do the same for an electrochcmical cell thay uses a silver-silver chloride relereace eliestrode instrad of eopper-copper sulfate. Simplify your expressions such that they oely depend os the concentration of the troa specien: 5. (2 marks) The potential of an snalyte contaieing a mixture of iron (II) and tron (li) vas metsieted uning bock silver-silver chloride and copper-copper sulfate reference electrodes. Calculate the difference between the two meaverneats anieg your answers ffoen Q4. Woald yod expeet to see a chagge in this difference if the conceesation of the analyie chongod? Wiry of why nog? 6. (2 marks) Salver-silver chloride (Ag/AgCl) clectroder are routincly used in clectrochemical measuteateets. Stctch a Agi/gCl reference electrode and label all components. 7. (1 mark) Provide two reasuos why the AgiAgCl eloctrode is one of the most uned referesice clectrodes 8. (I, mark) Define the werm 'ionopho4e' in the context of an ionseloctwe electrode. 9. (I mark) Define the term 'inatris eflest' ia the contect of analytical ctcemistry. Prelab 1 (TITN-SW): For questions 16 consider as electrochemical cell containing a copper-copper sulfate reforence electrode dipped in an andlyte containing iron (II) and iron (III) at 25C. The working electrode has a Pt wire attached to the voltmeter. The cell notation for this system is: 1. (0.5 marks) Write the expression for the equilibrium constant K for the reductios of iron (III) to iroe (II) 2. (0.5 marks) For the cell deseribed in QI wrile an equation to calculate Esedies in terms of the cosceatrations of iroo (II) and iron (III) asing the Nernst equation. Assume the temperature is 25C. 3. (2 marks) Whar is Enteesc for a silver-silver chloride clectrode and a copper-copper sulfate clectrode? Assame concentrations of filling solutions are 1M. E* for a silver-silver chloride clectrode is 0.197V. (Hint Stat from the Nertat equatioe to show yeer work, you may need to look-up values online). 4. (2 marks) Use your answers to questions 2 and 3 to write an expression for Esen for the electrochemical cell deseribed in the preamble. Do tho same for an electrochemical cell that uses a silver-silver chloride reference electrode instead of cepper-copper sulfate. Simplify your expressions such that they only depend on the concentration of the iroo species. 5. (2 marks) The potential of an analyte containing a miature of iron (II) and iroe (III) was measared waing boch silver-silver elloride and copper-copper sulfate reference eloctrodes. Calculate the difference belwoct the two meacurciments asing your answers from. Q4. Woald you expect to ste a change in this difference if the concentranion of the asalyte chasged? Why or why? not? 6. (2 marks) Silver-silver chloride (Ag/AgCT) electrodes are routincly ssed in clectrochemical mewarements. Sketch a Ag/AgCl reference electrode and label all components. 7. (1 mark) Provide two reasoes why the Ag/AgCl electrode is ooc of the most used referease clectrodes. 8. (1 mark) Define the term 'ionophore' in the context of an ion-selective clectrode. 9. (1 mark) Define the term 'inatrix effect' ia the context of atalytical chemistry

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