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### Topic: pH of 0.56M HF (pKa = 3.14)  (Read 4063 times)

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#### jokulsa

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##### pH of 0.56M HF (pKa = 3.14)
« on: October 05, 2014, 11:01:51 AM »
How do I find the pH of 0.56M of hydrofluoric acid HF?

(pKa = 3.14)

some working would be great
thanks

#### sjb

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##### Re: pH of 0.56M HF (pKa = 3.14)
« Reply #1 on: October 05, 2014, 11:06:35 AM »
How do I find the pH of 0.56M of hydrofluoric acid HF?

(pKa = 3.14)

some working would be great
thanks

What is the definition of pKa?

#### jokulsa

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##### Re: pH of 0.56M HF (pKa = 3.14)
« Reply #2 on: October 05, 2014, 11:10:02 AM »
pKa is the negative log of the Ka value isn't it?

#### Hunter2

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##### Re: pH of 0.56M HF (pKa = 3.14)
« Reply #3 on: October 05, 2014, 11:13:33 AM »
Yes and how is ka defined.

#### jokulsa

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##### Re: pH of 0.56M HF (pKa = 3.14)
« Reply #4 on: October 05, 2014, 11:16:20 AM »
Ka is the acid dissociation constant, tells you how strong an acid is

#### sjb

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##### Re: pH of 0.56M HF (pKa = 3.14)
« Reply #5 on: October 05, 2014, 11:28:31 AM »
Ka is the acid dissociation constant, tells you how strong an acid is

How does it do that?

#### jokulsa

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##### Re: pH of 0.56M HF (pKa = 3.14)
« Reply #6 on: October 05, 2014, 11:36:55 AM »
I really don't know...

#### Hunter2

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##### Re: pH of 0.56M HF (pKa = 3.14)
« Reply #7 on: October 05, 2014, 11:37:14 AM »