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Gadumais produced by the electrolysis ofa solulion Naoallaq Calcuatethe amounioy Ga/s)tholutionot oblained by dissolving that flows for 90.0 min. deposiled irom !8a...

Question

Gadumais produced by the electrolysis ofa solulion Naoallaq Calcuatethe amounioy Ga/s)tholutionot oblained by dissolving that flows for 90.0 min. deposiled irom !8allisoiuooide raconcentraled _ solulion by current of 0.780Number

Gadumais produced by the electrolysis ofa solulion Naoallaq Calcuatethe amounioy Ga/s)tholutionot oblained by dissolving that flows for 90.0 min. deposiled irom !8allisoiuooide raconcentraled _ solulion by current of 0.780 Number



Answers

Copper is purified by electrolysis (see Figure 23.6 ). A $5.00-\mathrm{kg}$ anode is used in a cell where the current is 37.8 A. How long (in hours) must the current run to dissolve this anode and electroplate it onto the cathode?

The reaction is Say you two polls achieve case to release her own pigs. See? You know this. So for one or two mul of Electoral, we have one more love save and one more off Alexis Moronic wants to for a day number already number is because too 90 I see 1005 100 Quilmes while Mullah FedEx Iran is the foreigner number two all of the nice little is to for a day because one more safe for mothers say you goes toe the molar mass off sale which is 16 points ploy No, we want to release 5000 can be changed They can get on five key to get on to get on 5000 Get down! I'm from here. They understand us home Oce Coolum isn't it? Is Mexico or soup 15 90 Seek can t eight by zero Coolum from here And we have the number of the cooler. It didn't the number of the colon because on there, once approved by time we want to know that how much is our time on the time in this formula is incident, it be divided everything by ah 3600 we have in other. So we divided this eggs that we have 15 19 68 50 divided by the on paper which is used charity seven 0.8 times. Because this number is in this can and we want to change it in our be divided by 3600. From here, we can calculate that has begun 111 point seven over needs time for this electoral this.

So now we work on problem 94 from chapter 20. This problem, we're told the elemental calcium is produced by the electrolysis of molten calcium chloride party. Whereas what massive calcium could be produced by this process if a current of 7.5 times 10 to the third amps is applied for 48 hours and we're told to assume that the electrolytic cells 68% efficient. So here we need to convert from time and amps to mass. So we're given time in amps, time and current, and we need to convert the mask of counsel. So we consent this problem here. Bye. Simply multiplying the of amps, times time, and then converting all of the appropriate units to get masks. So we have 7.5 times 10 to the third I am, and then we're totally apply this current for 48 hours so we can convert from ours seconds by multiplying by 36 100. Then we can convert from amps to cool a mes by, uh 1 to 1 ratio. Then, using Faraday's constant, we can convert to account until you to eliminate Coghlan's, and then also we need to recognize that one mole of calcium will consume two electrons. And we need to remember that our cell is 68% efficient and we need to convert, um from moles two grams. So he multiplied by 40 approximately grams for every mall of calcium in this means we can cancel amps begin, Cancel ours. We can cancel seconds Kula mes parents in mole's And this gives us a value of 1.83 times 10 to the fifth grammes of calcium produced with this current for that amount of time 1.83 times 10 to the fence Do come. So here on part B, they're asking us what is the minimum voltage needed to cause the electrons. So to calculate the voltage that we need to apply, we need to calculate the standard reduction of standard the potential for this cell. And so this rules subjecting cathode from the anode and the reduction at the cathode will be the reduction of this calcium in the reduction of calcium has a production potential of negative 2.87 in apathy. Other at the end of we're going to have the oxidation of Korean from seal minus two seal too. And so we put in the reduction potential for chlorine too. Our seal too. And we get 1.36 So we students subtraction and we get a value of negative for 0.23 boats. So the minimum applied voltage to be able to overcome this potential difference and force the reaction to G O is it must be greater than 4.23 boats.

In this problem I can write the value of you cube her lands of H two produces is equal to I. Multiplication T by 96,500. So putting the value here, .01 multiplication two is equal to 10 multiplication, Then to the par -3 multiplication, P by 96500. On solving it, I can write develop th 101 multiplication to multiplication 96500 by 10 multiplication, 10 to the par minus three, which is equal to 19.3 Multiplication tend to the powerful two to option B. Each correct answer for this problem, Option B. Each correct answer for this problem. I hope you understand the solution of this problem.

Cheers. All right. So, this question is about the how inherent process for the mm production of aluminum from aluminum oxide. Right. So, it's an electrolysis process. So, in the question says that if electrical current is passed through the process and The time for that process 24 hours and the massive aluminium produces 409 kg. What is the current that was passed through the that system? All right. So, we will first use the time. Right. And uh, we will first use the mass of the aluminum. All right. To know the most of aluminum produced. Then from there we can find the most electrons. Alright, So because we know that Q Because I time still curious the quantity the charge of electron. Yeah. So that is the current. I times the time T. So first we will convert the mass to malls. So, let's look at the masses for 0.9 times temple five g We converted to most. We have eliminated 26.98 grands prix more election. All right. And we will compare that with the most of electrons produced. We have three moles Yeah. Of electrons over one more of aluminum. All right. So that gives us Alright, let's bring it here. No. So, that gives us the most of electrons. The most of electrons to be 4.5, 5 times 10 power. four most of electrons. All right. Now, according to friday's constant. One more Mhm of electron have a charge of 96 For 85 columns. Right? So that gives us four points three night. I have a temperature Nike columns. All right. So, we know that he's got a testy. So, I I is the current It was Q. Who were T. So, this is actually the queue Value of Q. Alright, So Accuse four points. Reunite eyes temperature nine columns over the time. Uh The time is 24 hours. 24 hours will be 86,400 seconds. So that gives us the columns is empire. Second right? So the Seconds were cancelled out to give us 50 AIDS, one of the computers. All right. Yeah. Yeah. So we can write it is an art form to be a five you ate. Thanks to empower. Yeah. For campus. No. Okay. Mhm. Yeah. Mhm.


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