Calculate the pH-value of a solution that does not contain water

1. Nov 13, 2005

broegger

Hi,

How do one calculate the pH-value of a solution that does not contain water, pH being equal to -log([H3O+])?

I need to calculate the pH-value of a solution where BaCO3 and SrCO3 is dissolved in acetic acid (4 M). The only information I am given is, that half of the acetic acid is consumed in the reaction. Any hints?

2. Nov 13, 2005

mrjeffy321

You are given that the acetic acid is 4 Molar solution, and more likely than not, it is dissolve in water.

3. Nov 14, 2005

broegger

Ok, I see. The reaction is this (right?):

CO3^2- + CH3COOH -> HCO3^- CH3COO^-​

How can I determine pH? All I know is that half of the CH3COOH is used up in this reaction.

Last edited: Nov 14, 2005
4. Nov 14, 2005

Staff: Mentor

5. Nov 14, 2005

broegger

Thanks, man! :-)

6. Nov 14, 2005

Staff: Mentor

7. Nov 14, 2005

Staff: Mentor

Carbonates will decompose in acetic acid. You will be left with acetic buffer.

Although in so concentrated solution ionic strength is too high for any serious calculations.