Edexcel IAL Chemistry A2 19.11 amino acid acidity, basicity and peptides
Edexcel IAL Chemistry A2 19.11 amino acid acidity, basicity and peptides
Decide which groups gain or lose protons at the stated pH: amines protonate in acid, carboxyl groups deprotonate in alkali and peptide bonds link amino acids.
How this is tested
- Predict amino acid forms at low, neutral or high pH from protonated groups.
- Explain zwitterions using amine proton acceptance and carboxyl proton loss.
- Count amino acids in peptide repeat units or draw dipeptide structures.