Two More TBR Typos

[MedPR]

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They must have been drunk when they were writing the electrochem chapter.

Reducing agent: The reactant doing the reducing, getting reduced in the process

Also, unless I don't know how to add redox half-reactions... In demonstrating the half-cell method of balancing redox equations, they came up with the following. This is for balancing MnO4- +Zn --> MnO2 + Zn(OH)4 2- in basic solution

4H2O + 2MnO4- + 6e- ----> 2MnO2 +8OH-
3Zn + 12OH- ----> 3Zn(OH)4 2- + 6e-

4H2O + 2MnO4- + 3Zn ----> 2MnO2 +3Zn(OH)4 2- + 2OH-

Everything looks right to me except that the 2OH- on the product side should actually be a 4OH- on the reactant side in the overall reaction.

 

[ljc]

You are correct.

 

[chiddler]

they should hire you 😛

 

[inasensegone]

They must have been drunk when they were writing the electrochem chapter.



Also, unless I don't know how to add redox half-reactions... In demonstrating the half-cell method of balancing redox equations, they came up with the following. This is for balancing MnO4- +Zn --> MnO2 + Zn(OH)4 2- in basic solution



Everything looks right to me except that the 2OH- on the product side should actually be a 4OH- on the reactant side in the overall reaction.

OMG... I was just about to rage on this problem. I tried it on my own before reading their explanation and couldn't get their answer. Thank you for this!

(This is for TBR General Chemistry Chapter 10 Electrochemistry page 263)

 

[Czarcasm]

They should publish a page of errata on SDN on their website.

@BerkReviewTeach