How you you calculate/estimate the pH of a solution with 3 components all of different pHs?
Is there a paper describing this?
For example: 0.1M Buffer PCTP at pH 9.5 1.6M Sodium Dihydrogen Phosphate at pH 3.39 0.2M Sodium Acetate at pH 9.0255
The measured pH is ~5.5.
If i take a weighted average i.e (0.1 * 9.5 + 1.6*3.39 + 0.2 * 9.0255)/ 1.9 the pH is estimated at 4.311.
I assume the buffer "drags" up the pH but how to estimate this?