Edexcel IAL Chemistry A2 14.14 Ka from weak-acid experimental data
Edexcel IAL Chemistry A2 14.14 Ka from weak-acid experimental data
Convert experimental amounts into acid concentration, convert pH into [H+] and then substitute the equilibrium concentrations into the Ka expression.
How this is tested
- Calculate acid concentration from mass and volume before converting pH to [H+].
- Substitute [H+] and remaining acid concentration into Ka, then state mol dm-3 units.