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Topic: Buffer solutions - Calculate the concentration of H3O+  (Read 4954 times)

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Offline oscillate_wildly

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Buffer solutions - Calculate the concentration of H3O+
« on: August 05, 2009, 11:14:45 AM »
A buffer solution is prepared by mixing 150 mL of 0.15 M NaF and 65 mL of 0.030 M
HF. Calculate the concentration of H3O+ (given Ka for  HF  = 7.2 × 10–4) [14 marks]

I have no idea how to do this or where to start. Any help will be greatly appreciated. Thanks.
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Offline plankk

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Re: Buffer solutions - Calculate the concentration of H3O+
« Reply #1 on: August 06, 2009, 01:42:01 AM »
Do you know the Henderson–Hasselbalch equation? It will be useful here.
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Offline oscillate_wildly

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Re: Buffer solutions - Calculate the concentration of H3O+
« Reply #2 on: August 06, 2009, 06:03:00 AM »
Nope I don't think I do. Is that the only equation I need to apply to this? Thanks.
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