Edexcel IAL Chemistry A2 14.8 Acid dissociation constant expressions
Edexcel IAL Chemistry A2 14.8 Acid dissociation constant expressions
Identify the acid and conjugate base from the formula or structure, then place aqueous concentrations in square brackets without losing ionic charges.
How this is tested
- Write Ka as [H+][A-]/[HA] or the equivalent expression for the named weak acid.
- Preserve charges and formulas for conjugate bases such as carboxylates or protonated amines.
- Complete the dissociation equation before translating the species into the Ka expression.