Kurva Titrasi pH

Memplot kurva titrasi asam-basa lengkap dengan pH meter

Titrations Intermediate (High School) 50 menit ~$15,00

Tujuan

Catat pengukuran pH selama titrasi asam-basa dan buat kurva titrasi berbentuk S yang lengkap yang menunjukkan titik ekuivalen dan daerah penyangga.

Latar Belakang

A pH titration curve provides far more information than an indicator-based titration. The S-shaped curve reveals the buffer region, half-equivalence point (where pH equals pKa for weak acids), and the sharpness of the equivalence point. This experiment compares the curves of strong and weak acids.

Peringatan Keselamatan

  • HCl and NaOH are corrosive
  • Wear safety goggles and gloves
  • Handle the pH electrode carefully — it is fragile

APD yang Diperlukan

goggles gloves lab_coat

Bahan

  • Hydrochloric acid (HCl) (50 mL)
    0.1M
  • Sodium hydroxide (NaOH) (100 mL)
    0.1M
  • pH buffer solutions (3 bottles)
    pH 4, 7, 10 for calibration
  • Distilled water (200 mL)

Peralatan

50 mL burette Burette stand and clamp 250 mL beaker pH meter with electrode Magnetic stirrer 25 mL pipette Graph paper

Prosedur

1

Calibrate the pH meter using the three buffer solutions (pH 4, 7, 10).

5 menit Handle pH electrode gently
2

Pipette 25.0 mL of 0.1M HCl into the beaker. Record the initial pH.

3 menit
3

Fill the burette with 0.1M NaOH. Record the initial volume.

3 menit
4

Add NaOH in 1.0 mL increments, recording the pH after each addition. When pH changes rapidly, switch to 0.2 mL increments.

25 menit
5

Continue adding NaOH until the pH is above 12. Add a few more points past the equivalence point.

5 menit
6

Plot pH (y-axis) versus volume of NaOH (x-axis) to construct the titration curve.

7 menit

Hasil yang Diharapkan

The curve should show a characteristic S-shape: slowly rising pH initially, a steep jump around the equivalence point (pH 7 for strong acid-strong base), then leveling off at high pH. The equivalence point volume should be approximately 25 mL.

Pembersihan

Rinse the pH electrode and store in storage solution. Neutralize waste before disposal. Rinse all glassware.

Detail

Kategori
Titrations
Tingkat Kesulitan
Intermediate (High School)
Durasi
50 menit
Perkiraan Biaya
$15,00
Langkah
6
Bahan
4

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Frequently Asked Questions

What is the objective of Kurva Titrasi pH?
Catat pengukuran pH selama titrasi asam-basa dan buat kurva titrasi berbentuk S yang lengkap yang menunjukkan titik ekuivalen dan daerah penyangga.
How difficult is Kurva Titrasi pH?
This experiment is rated as Intermediate (High School). It takes approximately 50 minutes to complete.
What safety precautions are needed for Kurva Titrasi pH?
Key safety precautions include: HCl and NaOH are corrosive; Wear safety goggles and gloves; Handle the pH electrode carefully — it is fragile.
What materials are needed for Kurva Titrasi pH?
The main materials required are: Hydrochloric acid (HCl), Sodium hydroxide (NaOH), pH buffer solutions, Distilled water.
What results should I expect from Kurva Titrasi pH?
The curve should show a characteristic S-shape: slowly rising pH initially, a steep jump around the equivalence point (pH 7 for strong acid-strong base), then leveling off at high pH. The equivalence point volume should be approximately 25 mL.