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Topic: Concentration required  (Read 6171 times)

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Sargex

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Concentration required
« on: October 16, 2005, 11:02:01 AM »
What is the concentration of ammonia required to give a solution with ph 11.9? (Kb ammonia = 1.8e-5)
The answer I came up with is 0.008 but I'm really unsure if this is even close. Thoughts anyone?
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Offline Mitch

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Re:Concentration required
« Reply #1 on: October 16, 2005, 12:15:40 PM »
An answer without units is always wrong. Unless its a ratio or something.
« Last Edit: October 16, 2005, 12:16:01 PM by Mitch »
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Sargex

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Re:Concentration required
« Reply #2 on: October 16, 2005, 07:18:03 PM »
oh, sorry I meant 0.008M
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Offline Borek

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Re:Concentration required
« Reply #3 on: October 16, 2005, 07:42:23 PM »
Quote from: Sargex on October 16, 2005, 07:18:03 PM
0.008M

Way too low.

0.008M ammonia solution has pH = 10.57
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