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Using standard reduction potentials from the ALEKS Data tab, calculate the standard reaction free energy 4o" Be sure yout for the following redor unsiei has t...

Question

Using standard reduction potentials from the ALEKS Data tab, calculate the standard reaction free energy 4o" Be sure yout for the following redor unsiei has thc correct number signilicant digits. ZMno, 6)- SOH (aq)+3Zn (aq) 2MnO 4 (aq)+4H,0(0)+3Zn(s)00

Using standard reduction potentials from the ALEKS Data tab, calculate the standard reaction free energy 4o" Be sure yout for the following redor unsiei has thc correct number signilicant digits. ZMno, 6)- SOH (aq)+3Zn (aq) 2MnO 4 (aq)+4H,0(0)+3Zn(s) 00



Answers

Calculate the standard free-energy change at $25^{\circ} \mathrm{C}$ for the following reaction. $$4 \mathrm{Al}(s)+3 \mathrm{O}_{2}(g)+12 \mathrm{H}^{+}(a q) \longrightarrow 4 \mathrm{Al}^{3+}(a q)+6 \mathrm{H}_{2} \mathrm{O}(l)$$ Use standard electrode potentials.

To calculate the standard reduction potential in art reduction for the reduction off Berry um, two plus sign to gain electrons and from Perry. Um, so we have given and this there and barium react with Barry. Um, I react with the chloride ions to farm Very um chloride. The Delta Jeannot for this reaction is given, which is 16 point seven killer job. So to determine the standard reduction potential for this reaction, we will use the equation. The TelDta jean art is equal to minus. And if in art, rearranging this equation for inert, we will get in. Art is equal to minus delta g not divide by. And if putting the values so we will get in art is equal to minus where Delta Jean art is 16.7 kill a whole are 16 7 double zero chow. So we will put the value of Delta jean art and job, and this is equal to 16 7 double zero job where n is the number of moles of electron, which is to more off electrons. If it's Ferrari constant, which is 96,500 Cool, um, part moral of electrons so calculating the value off the energy we get in art is equal toe 2.906 Jowell, Pirkle, um are in art is equal toe minus two point 906 r 91 and straight up. Jowell Pirkle Um we will unit right the unit work because child per column is equal to one world. This is the required solution to this question.

To calculate the standard self potential. Be not off the self and tell Terje not for the self. The reaction is going in, which scared me, um, oxidizes into Serie two plus releasing two electrons. So the e not oxidation for the Caribbean is minus 0.40 world, as in the electrochemical Siri's. The value is given the reduction which is plus 0.40 world but to write and in the reverse direction we will write acceleration, so we will change the value. So no, the value is minus 0.40 world for the 10 is in two plus two gain their two electrons from Essen zero the e not production is minus 0.14 world calculate the SL. We will combining the two reactions so we can write that theory. Plus is in two plus form Siri to bless less Essen were he not off? The cell is the some of the e oxidation. Plus the reduction, which is minus 0.54 worked when e not his negative. Your value, then Delta GNR will help positive value. And in this case, the reaction is the reaction is non spontaneous to calculate Delta Jeannot Further reaction. So Delta Jean art is equal to minus. And if in art is and is the number of electrons last and gains or there it is to Mahler electrons if it's fairly constant, which is 96,500 Coolum per moral of electrons and we can also write in art off the cell they're just minus 0.5 forward and stood up. What we can write Joel Pirko is one world is equal toe one Joel per column. So putting the value minus to and to toe moral of electron and 96,500 Coolum Par moral of electrons multiply by minus zero point 54 Joel per column so we can cancel the Coolum unit with Coolum and mulch to mall. Multiplying this negative science, we will get the positive signs and multiplying all the values we will get Delta G not that is equal toe 104 Tau zero Jowell to change it in tow. Kilo Jowell He will divided by thousands. So we will get Delta Jeannot for this reaction. There it is, plus 104.2 Killer John, this is the required solution to the part. A of this question? No. In case up part of being we are to l a mini among react with the three Syria two plus to form toe a three plus plus three carried me. Um, so in this reaction, a lo mini, um oxidizes and toe a three plus releasing to L A mini, um release a total of six electron where the e not oxidation for the 1.66 world is the sign given and the electrochemical syriza's negative or that is the reduction potential. So we change it into acceleration. So we will write a minus 1.6 plus 1.66 words and case up the Caribbean three Siri plus can six electrons from three cadmium here s e reduction is minus 0.4 is you don't work. Combining both the equation we can write toe last three Siri two plus from toe a three plus plus three Siri Xerox relations state. The not off the cell is that some of the he not oxidation plus in not a production. So combining the two values, adding the two values we will get it is equal toe one point 26 words. Now, to find Delta G Nard, it is equal to minus. And if en och is in art is plus 1.26 So TelDta jeannot value will be negative. Oh, and the reaction will be spontaneous. So and this reaction and is the number of electrons last and again, which is six more off electrons if it's federally constant, which is 96,500? Cool, Um, part moral of electrons. While we can write the E note is 1.26 Instead up. What we can write. Joel Per column as we know one world is equal toe one. Joel Poor column So Delta G not is equal to minus six and two. There it is. Six malls up electrons where f is 96,500. Coolum Parmalat electrons and tow n art is 1.26 Job Pirkle Um we can cross the Coolum unit and the Mola Electron and multiplying all the values we get minus say one, 29 five, 40 travel to change it and to kill Ojha will we will divided by thousands. So Delta Denard is minus 7 29.54 Hello, John. It just the required solution to this question and the third part. Enter far. Seeing the diagram at I and CR two or seven to minus react with six. Say resign in the aqueous solution in the presence off or dean hydrogen ions from to see our three plus hair. Chromium has bean reduce from plus six toe plus three oxidation state and Iran has bean oxidized toe fair re kind seven. Water molecules form in the reaction and this the Iron Fair assign oxidizes toe fairy kind, releasing a total of six electron. So the oxidation for this reaction is minus 0.77 world, while the chrome eight on CR two or someone in the presence of hydrogen ions gain six electrons forming toe. See three plus signs and say one water molecules. So the e reduction for this reaction is plus 1.36 world. Combining the two equation. We can write their sex if a two plus react with the CR two or seven to minors and 14 hydrogen ions also take part in the reaction forming to see our three plus plus six if he three plus plus seven h tour We're e not off the cell is the sum of the oxidation, plus the reduction. So the adding their two values. We get the answer. 0.59 world. This is the e not off the cell. Delta Jeannot Off the cell will be equal to minus and f in art off the self. Where n is the number of electrons, which is six Moles up Electrons last are again in this reaction. If it's fairly constant, which is 96,500 cool, um, per mola electrons and and stood up en art. 0.59 world we can write jowl per column is one world is equal toe one Joel part of column. So putting the values minus six mall off electrons and 2 96,500 Coolum for more electrons and toe. Zero point 59 Joel per column. We can cross the Coolum unit and moral of electrons. So Delta Jeannot multiplying all the values will be equal to minus 341 610 John, change it and kill Ojha, Will, we will. Divided by thousands So minus 341 160 610 Killer John is the value of Delta Jean art, which is the required answer. This question

So here were given, um, corruption officials here Production potentials for this particular auspicious. Okay, we have Is this the electrons he was m and you will hear is negative. 0.10 works and another Ramadan uses him to place. Witness is going to to get to elect trims and itself being converted toe metal empty where the e really is negative. 0.50 worlds. Okay, but the bullet is deeming electric, so call reduction. Okay, way. We need to determine the potential for the half erection. You need to determine electric potential for these half reaction here. Okay, so we need toe friend evil, but we need to make use of the formula, you know, change the three energy. Okay, that given a negative 10 for the four days Constant, my brother, that you seven. Okay, but we have any. His end is here is a negative one and his one. Okay, so we need toe substance that you direction. OK, so let miss that, Uh, that he was mega too. One months of really is constant. Okay. Butler by images. A Mark Rivera that uses images electric potential over a particular cell. Okay, this is for that Give you Ah, you know, should be called toe. Should go toe be quitting this because we have this. And this with directions. Yes, they were giving telecom three elections rubber getting to the on that. Is there a prospective election professional? So you're going to quit backs, respectively? So we begin with the one that is gaining real occurrence here. Okay, So you re quitting these tow this. Okay, you get three much by for these questions, okay? And then with the by, uh, charge, if your negatives little flanked one get to 0.1. Okay. And then, uh, you must know that by negative, too Change, you know, balancing off these electrons. And then we must have been for this constant again for this constant. Ah, and then this thing, too, is electrons now. Negative trees. Directions for these. That's a contraction. And then what? They're being charged down his his negative 0.5. Okay, So in other words we do is something that is done to be here. It's with this first reaction here because we have the electrons. You're for this weapon. We have the touch, the electric. Officially, this bit from getting true is for the second. You know, we're getting two electrons potential when I do these and forced this part is for the latter way. We don't we don't have these. Let's. So there's going to be, you know, negative. They get you for this question e It is a professional. Could be 0.3. Uh, much of a forest constant. Better simplified, commits that Minister is going to give you 0.3. Okay. And there's one that means that you could be a negative zero point. So So if he is that e with these have been willing to work.

So here we are given a specific reaction. We have copper metal reacting with the nitrate ion and ion and hydrogen. I am to form essentially copper and it's two plus form and nitric oxide and H 20 And just by eyeballing it, we see that copper changes oxidation states. So this is a redox reaction. So let's essentially write this as basically half reactions with the same number of atoms on both sides and charge conservation. And we can do this by this process and let's write it for the reduction reaction as well. So we essentially have our reactions here. This is our and your reaction, copper goes to a higher oxidation state and this is a reduction reaction where nitrogen goes to a lower oxidation state. So now we essentially can find the values for our reduction potential pretty easily from a reduction potential table. Other basically this is a Reddit fairly accessible and we can find that the not for reduction For the reduction reaction is 0.96V while the not for oxidation, which we also can easily find from essentially a table can essentially be found as, yeah, -0.34V. Which leads us to find that the not sell. And also we never multiply basically for stock geometry, since reduction potentials are defined independent of the number of moles of electrons transferred. So this becomes zero 62 votes. And remember that we can relate free energy and sell potential by this equation and in this case and equals six moles of electrons or the six moles of electrons given up by the animals are transferred to the captured. And we can use basically Faraday's constant in terms of killer jewels. And we can find that essentially are free energy change is negative 359 kg, promote and this is our final answer.


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