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Topic: weak acid and weak base with additional of water  (Read 2882 times)

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Offline Even

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weak acid and weak base with additional of water
« on: July 21, 2011, 03:47:17 AM »
How does the addition of water affect the concentration of a weak acid or a weak base?

I am kind of confused with the concentration of each ions in a weak acid or base.

Does water ONLY dilutes the weak acid or base, or the water will split into H+ and OH- to react with the weak acid? Will there be any shift in equilibrium at all?

Thanks
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Offline AWK

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Re: weak acid and weak base with additional of water
« Reply #1 on: July 21, 2011, 06:57:37 AM »
hint - Ostwald dilution law
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Offline JustinCh3m

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Re: weak acid and weak base with additional of water
« Reply #2 on: July 21, 2011, 02:10:20 PM »
Kw = 1 x 10^-14.  If Ka (or Kb) of acid (or base) is weaker than this, addition of H20 will have profound effect on the pH
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Offline Even

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Re: weak acid and weak base with additional of water
« Reply #3 on: July 22, 2011, 11:19:08 PM »
Can someone elaborate ?
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