:) Without being a chemist myself, I need some basic understanding of the ion activities in my buffer solutions.
Now I am wondering whether the ion activity of the K$^+$ and Cl$^-$ ions is different for the buffers with different pH-values.
When I google for that, all I get is ion activity for the hydrogen ion, which -I think- does not interest me at all.
If the ion activity actually IS different, could you point me to some table to look up the correction values?
The buffer solutions contain:
Buffer A: 250mM KCl, 10mM MOPS
Buffer B: 020mM KCl, 10mM MOPS
pH is set to 5,6,7 resp., using unknown amounts of Tris.
Is the ion activity of K$^+$ and Cl$^-$ affected by the pH?