Calcolatore pKb
Calcola il pKb di una base dal valore della costante di dissociazione Kb.
pKb
4.74
Formula
## How to Calculate pKb ### Formula **pKb = −log₁₀(Kb)** Where: - **pKb** = negative base-10 logarithm of Kb - **Kb** = base dissociation constant A lower pKb indicates a stronger base. pKa + pKb = 14 at 25°C for a conjugate pair.
Esempio Risolto
Ammonia has Kb = 1.8 × 10⁻⁵.
- 01pKb = -log₁₀(Kb)
- 02pKb = -log₁₀(1.8 × 10⁻⁵)
- 03pKb = 4.74
Domande Frequenti
What does pKb tell you?
pKb measures base strength on a logarithmic scale. Lower pKb means stronger base. Each unit decrease represents a 10-fold increase in base strength.
How are pKa and pKb related?
For a conjugate acid-base pair at 25°C, pKa + pKb = 14. This comes from Ka × Kb = Kw = 10⁻¹⁴.
How do I convert pKb back to Kb?
Kb = 10^(-pKb). For example, pKb = 4.74 gives Kb = 10^(-4.74) = 1.82 × 10⁻⁵.
Impara