Buffer Solution Calculator - pH Buffer
Calculate the pH of an acidic or basic buffer solution using the Henderson-Hasselbalch equation. Essential for chemistry, biochemistry, and pharmaceutical students studying acid-base equilibria. Supports both acidic buffers (weak acid + conjugate base) and basic buffers.
Henderson-Hasselbalch Equation
pH = pKa + log([A⁻]/[HA])Variables:
- pHAcidity levelAcidity level
- pKa-log(Ka) of Weak Acid-log(Ka) of Weak Acid
- [A⁻]Conjugate base concentration (Salt)Conjugate base concentration (Salt)
- [HA]Weak acid concentrationWeak acid concentration
How to Use
- 1
Select Jenis Buffer
Buffer Asam (Asam Lemah + Garam) or Basa (Basa Lemah + Garam).
- 2
Input Konsentrasi
Enter molaritas asam/basa and garamnya.
- 3
Input Ka/Kb
Enter tetapan ionisasi.
- 4
Calculate
Dapatkan nilai pH larutan.
Examples
Buffer Asetat
Problem:
0.1 M CH3COOH (Ka=1.8e-5) + 0.1 M CH3COONa.
Solution:
- 1.pKa = -log(1.8e-5) = 4.74
- 2.log(0.1/0.1) = 0
- 3.pH = 4.74 + 0
Result:pH = 4.74
Larutan memiliki kapasitas penyangga optimal on pH = pKa.
Frequently Asked Questions
Apa fungsi larutan penyangga?
Mempertahankan pH agar relatif stabil saat ditambahkan sedikit asam or basa.
When buffer paling efektif?
Saat rasio [Garam]/[Asam] mendekati 1, or pH ≈ pKa.