EOC Exercise 17.68 (Section 17.5)

[Zellmer, Robert]

I know it's spring break, so I hate to bother you, but some people are
working on material we covered the week before spring break.

This is a problem with EOC exercise 17.68. The solution manual adds
3 equations together to get an eqn and then adds H+ to both sides to get
the final eqn.  However, when they did this, they didn't do it as adding
another reaction eqn and accounting for the K for this added reaction.

It should have been done by adding a 4th eqn, the reverse of the self-ionization
eqn for H2O and including 1/Kw in the final calculation for the K. I've corrected
it the best I could by editing a PDF file and attached that.

Dr. Zellmer
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