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Topic: Using an ICE table to solve a Henderson-Hasselbalch problem  (Read 3750 times)

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Offline StevenUSF

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Using an ICE table to solve a Henderson-Hasselbalch problem
« on: October 02, 2014, 09:51:30 PM »
In 0.1M solution of weak acid: pH=9.0, pKa=9.6. How much 5M KOH must be added for pH=10.0? My answer book suggests to use the HH equation, but I want to solve using an ICE table. Is the possible? If so, how?
« Last Edit: October 02, 2014, 10:03:30 PM by StevenUSF »
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Offline Borek

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Re: Using an ICE table to solve a Henderson-Hasselbalch problem
« Reply #1 on: October 03, 2014, 04:42:43 AM »
ICE table works when your unknown is related to Change, in this question your unknown is Initial. Perhaps it is possible to somehow tweak ICE table approach, but I don't see how ATM.

You can use ICE table to find the exact pH of the buffer (once you know how it was prepared):

http://www.chembuddy.com/?left=buffers&right=with-ICE-table

Not that it makes much sense, as you can see the difference between 'exact' answer and the one yielded by HH equation is negligible.
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