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Topic: Can someone help me with this question?  (Read 3123 times)

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Offline Dillllon

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Can someone help me with this question?
« on: December 09, 2007, 10:03:11 PM »
A buffer solution is 1.20 M in HF and 1.20 M in NaF. If 0.200 moles of NaOH are added to 1.00 L of the buffer, what is its pH? Assume the volume remains constant. Ka of HF = 7.2 x10-4. THANKS
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Offline agrobert

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Re: Can someone help me with this question?
« Reply #1 on: December 09, 2007, 10:47:43 PM »
Did you attempt the problem?  What do you need for pH calculations?  How do buffers work?  Think [H+] concentration?  What effect does NaF and what does NaOH do?
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Offline Dillllon

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Re: Can someone help me with this question?
« Reply #2 on: December 09, 2007, 11:25:45 PM »
No, I haven't really attempted it because once I find the pH of the buffer I don't know where to go from there.
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Offline Borek

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Re: Can someone help me with this question?
« Reply #3 on: December 10, 2007, 03:14:14 AM »
What happens when you add strong base to weak acid (HF) solution?
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