Possible pH of HF (calculation?)

[Primarygun]

What's the possible lowest pH of HF, given the highest concentration is 27M ( molarity)?

[NeonBlack]

you'll need to know the ka.

[Primarygun]

It's known that it's a superacid, please estimate it for me.

[Yggdrasil]

According to my notes the pK_a of HF is 3.2

[Primarygun]

so what's the pH?

[NeonBlack]

I'm probably wrong, but I got about 0.88

[Primarygun]

How about Ka=6.4?

[NeonBlack]

How about Ka=6.4?

 

 

pH=1.1 ?

[Borek]

Check out the lecture:

 

http://www.chembuddy.com/?left=pH-calculation&right=pH-weak-acid-base

 

and example question:

 

http://www.chembuddy.com/?left=pH-calculation-questions&right=pH-weak-acid-q1

 

pKa = 3.45

 

However, calculation for 27M solution will be not accurate, as the activities start to play important role.

 

Try BATE to calculate pH.

 

Best,

Borek

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