Titrasi Balik Tablet Antasida

Mengukur kapasitas penetralan asam antasida komersial

Titrations Intermediate (High School) 60 menit ~$12,00

Tujuan

Tentukan kapasitas penetralan asam tablet antasida komersial menggunakan metode titrasi balik.

Latar Belakang

Direct titration of antacid is impractical because the active ingredients dissolve slowly. In a back titration, excess acid is added to the antacid, allowed to react fully, and the remaining unreacted acid is titrated with base. The difference reveals how much acid the antacid neutralized.

Peringatan Keselamatan

  • HCl and NaOH are corrosive
  • Wear safety goggles and gloves
  • Use caution with the hot plate

APD yang Diperlukan

goggles gloves lab_coat

Bahan

  • Antacid tablets (2 tablets)
    CaCO₃-based, like Tums
  • Hydrochloric acid (HCl) (200 mL)
    0.5M
  • Sodium hydroxide (NaOH) (100 mL)
    0.5M standardized
  • Phenolphthalein indicator (5 mL)
  • Distilled water (200 mL)

Peralatan

50 mL burette Burette stand and clamp 250 mL Erlenmeyer flask 25 mL pipette Mortar and pestle Analytical balance Hot plate

Prosedur

1

Weigh the antacid tablet accurately on the analytical balance and record the mass.

3 menit
2

Crush the tablet into a fine powder using the mortar and pestle.

3 menit
3

Transfer the powder to the Erlenmeyer flask. Add exactly 50.0 mL of 0.5M HCl using the pipette.

3 menit Handle HCl carefully
4

Gently heat the mixture on the hot plate for 10 minutes to ensure complete reaction of the antacid.

12 menit Do not boil vigorously
5

Allow the solution to cool to room temperature.

5 menit
6

Add 2-3 drops of phenolphthalein indicator.

1 menit
7

Fill the burette with 0.5M NaOH. Titrate the excess HCl until a persistent pale pink color appears.

10 menit
8

Record the volume of NaOH used. Calculate moles of excess HCl, then moles neutralized by the antacid.

5 menit

Hasil yang Diharapkan

A typical CaCO₃-based antacid tablet (500 mg) should neutralize approximately 10 mmol of HCl. The mass of CaCO₃ calculated should approximate the labeled amount on the package.

Pembersihan

Neutralize all waste solutions before disposal. Rinse glassware thoroughly. Clean the mortar and pestle.

Detail

Kategori
Titrations
Tingkat Kesulitan
Intermediate (High School)
Durasi
60 menit
Perkiraan Biaya
$12,00
Langkah
8
Bahan
5

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Frequently Asked Questions

What is the objective of Titrasi Balik Tablet Antasida?
Tentukan kapasitas penetralan asam tablet antasida komersial menggunakan metode titrasi balik.
How difficult is Titrasi Balik Tablet Antasida?
This experiment is rated as Intermediate (High School). It takes approximately 60 minutes to complete.
What safety precautions are needed for Titrasi Balik Tablet Antasida?
Key safety precautions include: HCl and NaOH are corrosive; Wear safety goggles and gloves; Use caution with the hot plate.
What materials are needed for Titrasi Balik Tablet Antasida?
The main materials required are: Antacid tablets, Hydrochloric acid (HCl), Sodium hydroxide (NaOH), Phenolphthalein indicator, Distilled water.
What results should I expect from Titrasi Balik Tablet Antasida?
A typical CaCO₃-based antacid tablet (500 mg) should neutralize approximately 10 mmol of HCl. The mass of CaCO₃ calculated should approximate the labeled amount on the package.