Write the balanced half-reaction for the reduction of As4010(s) to As406(s) in basic conditions. When writing your response, include phases, and don't worry too much about formatting.
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- Give example of sacrificial anodes and noble coating, define the two and give practical application2. a) for a buried iron tank protection system using a sacrificial anode, which metal would you use as the anode? justifyb) make a schematic drawing representing this system and explain how this protection mechanism works based on the standard potential of metals, informing the cathodic and anodic half-reactions and specifying the cathodic and anodic region in the drawing.c) name another 4 (four) different corrosion protection processes and briefly explain their mechanism of action.please show the given and required as well as the half-reactions for a more detailed format.
- Write the relevant half-reactions, then combine them into a full reaction, for Fe2+ oxidation to Fe3+ by O2 going to H2OA dilute solution of CuSO4 was electrolyzed using Pt- electrodes. The amount of Cu in the anodic solution was found to be 0.6350 g and 0.6236 g before and after electrolysis, respectively. The weight of Ag deposited in a silver coulometer, placed in series, was found to be 0.1351 g. Calculate the transport numbers of Cu+2 and SO4-2.Write out the half reaction as it would actuall Accur at the anode. And is there a min or a max standard reduction.
- (Please give clear handwritten answer) 0.1 M HNO3 solution at 298K was electrolyzed in Hittorf cell using platinum electrodes. After electrolysis, 34.2 mg of copper was deposited in coulometer which in series with the Hittorf cell. 50 mL of HNO3 solution was withdrawn from anode compartment after electrolysis and found to have a concentration of 0.0821 M. [Atomic mass Cu = 63]. (i) Find the transference number of H + and NO3 −. (ii) If 50 mL HNO3 solution was run off from cathode compartment, what would its concentration be?Below are the reduction half reactions for chemolithoautotrophic nitrification, where ammonia is a source of electrons and energy and oxygen is the terminal electron acceptor. NO2- + 6e- -> NH4+ (E0 = +0.34 volts) O2 + 4e- -> 2H2O (E0 = +0.82 volts) If you balance and combine the reactions so that 293 moles of NH4+are oxidized to NO2-, how many moles of electrons will be transferred from Nitrogen to Oxygen?a. Write an overall reaction for the corrosion of solid iron in acidic media, and calculate the standard cell potential for the reaction. b. Then, Will the overall reaction of iron you wrote in (a) still proceed if the reaction is in alkaline media? Propose a reaction, and theorize observable changes based on your proposed reaction.
- Why might experimentally measured reduction potentials not be equal to the theoretical reduction potentials within a electrochemistry experiment?What is the aim of submerging the electrode in a potassium chloride solution? Must this be stored in a distilled or deionized water? What is the aim of measuring the pH meter utilizing reference buffers?The sensitivity of a coulometer is governed by the delivery of its minimum current for its minimum time. Suppose that 5 mA can be delivered for 0.1 s.(a) How many moles of electrons are delivered at 5 mA for 0.1 s? (b) How many milliliters of a 0.01 M solution of a two-electron reducing agent are required to deliver the same number of electrons?