- May 2018
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chem.libretexts.org chem.libretexts.org
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E∘cell=RTnFlnK=(8.314JK⋅mol)(298.15K)n×96,485C/V⋅mollnK=0.0257Vnln
I cannot follow how 0.0257/n turns into 0.0592/n i have tried several times but i don't understand the relation.
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- Apr 2018
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chem.libretexts.org chem.libretexts.org
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Add answer text here and it will automatically be hidden if you have a "AutoNum" template active on the page.
I had an annotation here reminding to put the balanced equation and I even balanced the equation, but some how my annotation got deleted? The balanced equation I believe is: 6H2O+5H++Cr2O7-2+HSO3-<=>2Cr(H2O)5SO4++SO4-2
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Balance the following equation in acidic solution. Cr2O−27+HSO−3⇋Cr(H2O)5SO+4+SO−24Cr2O7−2+HSO3−⇋Cr(H2O)5SO4++SO4−2Cr_2O_7^{-2} + HSO_3^- \leftrightharpoons Cr(H_2O)_5SO_4^+ + SO_4^{-2} \nonumber Note: the above equation has a complex ion (Cr(H2O)5SO+4+SO−24Cr(H2O)5SO4++SO4−2Cr(H_2O)_5SO_4^+ + SO_4^{-2} that is involved with both half reactions, the chromium (which gets reduced) and the sulfur (which got oxidized). Answer
What is the balanced equation??
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Cr2O−27+HSO−3⇋Cr(H2O)5SO+4+SO−24
write in that everything is aqueous
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++
Remove one + sign.
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undergoins
*undergoing
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cancelling
*canceling
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other atoms
clarify-other species has atom
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Annotators
URL
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www.ualr.edu www.ualr.edu
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Question 1 Determine the cell voltage E at 250C, when [Fe2+]=[I-]=0.01M, [Fe3+]=0.02M.
When [Fe2+] = what?? dont we need this concentration to solve Q??
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Annotators
URL
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chem.libretexts.org chem.libretexts.org
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meanint
typo "meaning"
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.)
typo- delete ")"
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are the different because the zero values
typo- delete "the"
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www.ualr.edu www.ualr.edu
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Question 1 Determine the standard potential (V) for the cell reaction.
do we not need to multiply the Fe+3 resction by 2 - since it happens 2 times?? i get 2(.77)-.54 = 1
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www.ualr.edu www.ualr.edu
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Question 5 5.
This problem need more info. to solve. the hint leads to a previous problem not included in this set.. it says k previous solved in #7...this is # 5...
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Annotators
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www.ualr.edu www.ualr.edu
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Question 3 Balancing the reactions in the acidic solution:
Do we need to balance this equation first? have equal # of Cr & Oxygen on each side?? why would split this first?
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chem.libretexts.org chem.libretexts.org
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Electrons flow towards a positive object and negative charge to it
This sentence doesn't make sense. Revise.
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a an
Remove "a"
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direction, in which case the electrochemical cell
Period after direction "." In this case the electrochemical cell.....
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voltaic cell, which can be used to provide energy to do work
period after voltaic cell"."These two cells can be used to provide energy to do work.....
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reactions
reaction*
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modereleases
*model releases
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into
in
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can be split
delete be - can split
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