[biskit]

Hi guys,

I know this might sound newbie to you but i just want to make sure that i got my theory right. I just came across this wierd question during my quiz asking me to find the pka of this substance that is insoluble in acetic acid 0.1molar, PH at 4.

Now, i thought Pka only applies to solutions? If this substance is insoluble, how am i going to calculate the pka of that substance? All along i've only calculated pka for solutions but this is the first time i came across a qn asking us to calculate the pka of a substance( insoluble, will probably just form a  suspension in the acetic acid)?

Any kind souls here please do enlighten me a bit.

 

[Borek]

1. What is exact wording of the question?

2. Assume for the moment that the substance is an organic weak acid with relatively large non-polar carbon chain. What will happen when the pH goes up?