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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])

Keterangan:

  • pH
    Acidity level
  • pKa
    -log(Ka) of Weak Acid
  • [A⁻]
    Conjugate base concentration (Salt)
  • [HA]
    Weak acid concentration

How to Use

  1. 1

    Select Jenis Buffer

    Buffer Asam (Asam Lemah + Garam) or Basa (Basa Lemah + Garam).

  2. 2

    Input Konsentrasi

    Enter molaritas asam/basa and garamnya.

  3. 3

    Input Ka/Kb

    Enter tetapan ionisasi.

  4. 4

    Calculate

    Dapatkan nilai pH larutan.

Contoh Perhitungan

Buffer Asetat

Soal:

0.1 M CH3COOH (Ka=1.8e-5) + 0.1 M CH3COONa.

Penyelesaian:
  1. 1.pKa = -log(1.8e-5) = 4.74
  2. 2.log(0.1/0.1) = 0
  3. 3.pH = 4.74 + 0
Hasil:pH = 4.74

Larutan memiliki kapasitas penyangga optimal on pH = pKa.

Pertanyaan yang Sering Diajukan (FAQ)

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.

Kalkulator Terkait

Calculator pH

pH Asam Basa Kuat/Lemah

Molaritas

Calculate konsentrasi

Referensi