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Topic: Another Acid/Base pH practice problem I am having trouble with?  (Read 4543 times)

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Offline CrimsonElf22

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Another Acid/Base pH practice problem I am having trouble with?
« on: June 02, 2013, 07:40:34 PM »
The pH of a .016M aqueous solution of p-toluidine is 8.60.  Calculate Kb. 

I got 9.9 x 10^-10 as my answer, but the book says it is 1.0 x 10^-10.  What do I do?
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Offline EDTA

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Re: Another Acid/Base pH practice problem I am having trouble with?
« Reply #1 on: June 02, 2013, 07:48:47 PM »
You are correct, I got the same result. :)
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Offline shalikadm

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Re: Another Acid/Base pH practice problem I am having trouble with?
« Reply #2 on: June 03, 2013, 12:37:29 AM »
me too..as kb=9.905×10-10moldm-3
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Offline Borek

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Re: Another Acid/Base pH practice problem I am having trouble with?
« Reply #3 on: June 03, 2013, 03:08:44 AM »
Any Kb value between 9.677×10-10 and 1.013×10-9 will yield pH of 6.80 for this solution. My bet is they meant 1×10-9, not 1×10-10.
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