Question regarding SDS-PAGE What would happen if you reversed the polarities of your system, thus the anode at the top and the cathode at the bottom?
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Question regarding SDS-PAGE
What would happen if you reversed the polarities of your system, thus the anode at the top and the cathode at the bottom?
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- When a solution of NaI in water was electrolyzed with graphite electrodes, a gas was evolved at the cathode and a yellow-brown color was observed around the anode. The solution became basic. Which one of statements (a) - (d) is not correct? If all are correct, select option (e). Please see the data page for relevant electrode potentials for the half reactions.a) OH- ions were formed at the cathode.b) I- ions were oxidizedc) The gas, which was evolved, was O2.d) Water was reducede) Statements (a) - (d) are all correctIn the electrolysis of water, how long will it take to produce 75.00 L of H₂ at 1.0 atm and 273 K using an electrolytic cell through which the current is 169.0 mA? hours ..! See Periodic Tab11. Anode in an electrochemical cell represents the positive terminal (a) True (b) False 12. Electrons are consumed at the cathode during an electrochemical reaction (а) True (b) False 13. The absolute electrode potential cannot be measured experimentally (a) True (b) False 14. Nernst equation provides the electrode potential at conditions different than standard conditions. (a) True (b) False 15. The solution is called neutral if [H*] = [0H¯] (а) True (b) False 16. Pourbaix diagram provides information about the rate of corrosion reaction (а) True (b) False 17. The charge is conserved in an electrochemical cell (а) True (b) False 18. Activation polarization is caused by changes in the ions concentration near the electrode/electrolyte inter- face (а) True (b) False 19. An excellent passivating alloy is with lower icrit , more active (-ve) Epp , and low ipass (a) True (b) False 20. The protective oxide film is damaged and may break down completely in the transpassive region of the…
- d) Show the equation and describes Faradays law which relates moles of analyte to charge in coulombs and write the equation that relate charge in coulombs to current e) A constant current of 0.800 A was used to deposit copper at the cathode and oxygen at the anode of an electrolytic cell. Calculate the mass of each product that was formed in 15.2 min, assuming that no other redox reactions occur.Solve correctly please. (Gpt/Ai wrong answer not allowed). In the electrolysis of water, how long will it take to produce 115.0 L of H2 at 1.0 atm and 273 K using an electrolytic cell through which the current is 125.0 mA?How many grams of silver will be obtained when the aqueous silver nitrate solution is electrolyzed for 20 minutes with a constant current of 2.40A? Please explain all steps
- Calculate the mass of Cu formed by electrolysis of CuSO4 by a current 2.32 A flowing for a period of 71 h. Assume the electrolytic cell is 70 % efficient. Hint: for the molar mass use 3 decimal placesIf you constructed a cell with a copper electrode in contact with a 0.1 M solution of Cu2+ ions in onecell compartment and a copper electrode in contact with a 0.001 M solution in the othercompartment would a cell potential develop or would the potential of the cell be 0.00 V? (HINT:What would the Nernst equation for this cell look like?) Feel free to construct this cell and measureits potential if you wish to check your answer.In a separate electroplating experiment, if a 5.00 A current was used to electroplate a penny for 5.00 minutes, calculate how many grams of zinc will be plated on the penny. Note you would need to use the Faraday’s constant, molar mass of zinc and cathode equation to answer this question.
- Why EMF of the cell increases when the concentration of the solution at the anode decreases? Why EMF of the cell increases when the concentration of the solution at the cathode increases? What does Le Chatelier's Principle has something to do with this?A student uses a battery to electrolyze an aqueous solution of ZnF2 in a U-tube just like we did in Exp #8. Given the reduction potentials provided on the reference sheet, which of the following is the correct cathode and anode? a) Zn2+ is reduced at the cathode while F- is oxidized at the anode. b) Zn2+ is reduced at the cathode while water is oxidized at the anode. c) Water is reduced at the cathode while F- is oxidized at the anode. d) Water is reduced at the cathode while water is oxidized at the anode. e) No reaction occurs.What mass of copper , in mg , can be deposited from copper (II) sulfate solution using a current of 0.5 A over 10 seconds? Write answer up to two decimal places in units mg
