Which of the following compounds is the most basic at 25°C in aqueous solution?

Step-by-step solution

1. Write the base dissociation constants for the options: aniline (Kb≈5.9×10⁻¹⁰), diethylamine (Kb≈5.6×10⁻⁴), 1‑methylpyrrolidine (Kb≈5×10⁻⁴), pyridine (Kb≈1.7×10⁻⁹).
2. Compare the Kb values; the larger the Kb, the stronger the base.
3. Identify the largest Kb, which belongs to diethylamine.
4. Conclude that diethylamine is the most basic compound.

Concept tested: Relative basicity of amines

Published 17 September 2026 · How this solution was prepared and checked