Purification of chromium can be achieved by electrorefining chromium from an impure chromium anode onto a...

Purification of chromium can be achieved by electrorefining chromium from an impure chromium anode onto a pure chromium cathode in an electrolytic cell. Calculate the amount of hours it will take to plate 12.0 kg of chromium onto the cathode if the current passed through the cell is held constant at 38.5 A. Assume the chromium in the electrolytic solution is present as Cr^3+

______ h

Expert Solution

Cr⁺³ + 3e^- ---------> Cr

Z = 3

M = 52g/mole

C = 38.5A

W = 12Kg = 12000g

W = MCt/ZF

12000 = 52*38.5*t/3*96500

t = 12000*96500*3/52*38.5

= 1735264.74sec

t = 1735264.74/3600 [ 1hr = 3600sec]

= 482hr

queen_honey_blossom answered 2 years ago

A galvanic cell consists of a chromium anode immersed in a CrSO4 solution and a lead...

A galvanic cell consists of a chromium anode immersed in a CrSO4 solution and a lead cathode immersed in a PbSO4 solution. A salt bridge connects the two half-cells. (a) Write a balanced equation for the cell reaction. -------- (aq) or (s) or (l) or (g) + -------- (aq) or (s) or (l) or (g) = --------- (aq) or (s) or (l) or (g) + ------- (aq) or (s) or (l) or (g) (b) A current of 1.16 A is...

Keynes (1936) argued that, from a policy perspective, everything that can be achieved by a nominal...

Keynes (1936) argued that, from a policy perspective, everything that can be achieved by a nominal wage cut can be more effectively achieved through an appropriate monetary policy. (a) Does this statement hold in the deficient-demand Keynesian model for a negative shock to (i) aggregate demand and (ii) aggregate labor productivity? (b) Does this statement hold in the new Keynesian model for a negative shock to (i) aggregate demand and (ii) aggregate labor productivity?

Chromium metal can be electroplated from an acidic solution of (CrO4)-2 a. Write the half reaction...

Chromium metal can be electroplated from an acidic solution of (CrO4)-2 a. Write the half reaction b. Determine the equivalent weight of Cr. c. What mass of Cr, in grams, will be deposited by a current of 98.54 C? d. What mass of Cr, in grams, will be deposited by a current of 3.0 amps passing for 4 minutes? e. How many minutes will it take for 1.5 grams of Cr to be deposited by a current of 1.2 amps?...

*Electrons flow from anode to cathode because of difference in ____

Questions Relating to Voltaic Cell and Potential Energy:*Electrons flow from anode to cathode because of difference in ____*Electrons flow spontaneously through circuit due to –––––*For a Zn Anode and Cu cathode setup, electrons flow from Zn to Cu due to ––––*If a cell is operated under standard conditions then the cell voltage (potential) is indicated by –––––

Can an impure sample of citronellal be purified by recrystallization? Justify your answer.

Create a phase diagram for carbon dioxide (can take from online) onto a sheet of blank...

Create a phase diagram for carbon dioxide (can take from online) onto a sheet of blank paper and (i) label both axes (ii) label all areas (iii) explain what is meant by the triple point and draw it onto your diagram (iv) explain what is meant by the critical point and draw it onto your diagram (v) Now draw the corresponding phase diagram for water, explaining as fully as you can the reason for any differences from the diagram for...

Distillation column pressure variation can increase column capacity. Capacity gains can be achieved either from raising...

Distillation column pressure variation can increase column capacity. Capacity gains can be achieved either from raising or lowering the pressure. Raising the pressure reduces gas density, thus allowing a greater vapor flow rate through the column, but it also reduces relative volatility, causing a higher reflux and reboil requirement for the same separation. Research and describe a scenario where applying a pressure variation to a distillation column might be preferable

“If there are no transaction costs, then an efficient outcome can be achieved in the presence...

“If there are no transaction costs, then an efficient outcome can be achieved in the presence of an externality if the government completely allocates tradable property rights over the externality generating activity. Furthermore, the final outcome will be invariant to the specific initial allocation of property rights that is chosen by the government.” Is this claim true, false or ambiguous? Justify your answer. (Please write as much as you can)

Silver ion, Ag+, can be recovered from photographic solutions by adsorbing onto an ion exchange resin...

Silver ion, Ag+, can be recovered from photographic solutions by adsorbing onto an ion exchange resin (Langmuir adsorption) Ag+ +Ex↔ Ag-Ex logKL =12.30 (where Ex represents an adsorbing site on the resin). According to the manufacturer, the resin has 1.20 x10-5 moles of adsorbing sites per gram of resin. a) If you have a liter of solution with [Ag+] = 0.030 mM, how much resin will you need to adsorb all the silver assuming 100% binding? b) Calculate the predicted...

Can an impure sample of oleic acid be purified by recrystallization? Justify your answer for full...

Can an impure sample of oleic acid be purified by recrystallization? Justify your answer for full credit.

Question