Pengumpulan Gas Hidrogen

Menghasilkan dan mengumpulkan hidrogen dari seng dan asam

Gas Laws Intermediate (High School) 35 menit ~$10,00

Tujuan

Hasilkan gas hidrogen dari reaksi seng dengan asam klorida dan kumpulkan dengan pengusiran air.

Latar Belakang

When zinc metal reacts with hydrochloric acid, hydrogen gas is produced: Zn + 2HCl → ZnCl₂ + H₂. The gas can be collected by water displacement in an inverted graduated cylinder, allowing volume measurement and mole calculations.

Peringatan Keselamatan

  • Hydrogen gas is extremely flammable — NO open flames nearby
  • HCl is corrosive
  • Work in a well-ventilated area
  • Do not seal the system completely — pressure buildup risk

APD yang Diperlukan

goggles gloves lab_coat

Bahan

  • Zinc granules (5 g)
  • Hydrochloric acid (HCl) (50 mL)
    2M
  • Distilled water (500 mL)

Peralatan

Erlenmeyer flask (250 mL) Rubber stopper with delivery tube Pneumatic trough or large bowl Graduated cylinder (100 mL) Rubber tubing

Prosedur

1

Fill the pneumatic trough with water. Fill the graduated cylinder with water, invert it, and place it in the trough.

5 menit
2

Place 5 g zinc granules in the Erlenmeyer flask.

2 menit
3

Add 50 mL of 2M HCl to the flask. Quickly insert the rubber stopper with delivery tube.

2 menit HCl is corrosive
4

Direct the delivery tube under the inverted graduated cylinder. Collect the hydrogen gas by water displacement.

10 menit No flames — hydrogen is flammable
5

When the reaction slows, record the volume of gas collected. Note temperature and atmospheric pressure.

3 menit
6

Optionally, perform the squeaky pop test: bring a lit splint near a small collection of H₂.

3 menit Very small amount only
7

Calculate moles of H₂ using ideal gas law and compare with moles predicted from zinc mass.

5 menit

Hasil yang Diharapkan

5 g Zn = 0.076 mol should produce 0.076 mol H₂ = ~1.9 L at STP. The collected volume should be close to this when corrected for temperature and water vapor pressure.

Pembersihan

Neutralize remaining acid with sodium bicarbonate. Dispose of zinc chloride solution down the drain. Rinse all equipment.

Detail

Kategori
Gas Laws
Tingkat Kesulitan
Intermediate (High School)
Durasi
35 menit
Perkiraan Biaya
$10,00
Langkah
7
Bahan
3

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Frequently Asked Questions

What is the objective of Pengumpulan Gas Hidrogen?
Hasilkan gas hidrogen dari reaksi seng dengan asam klorida dan kumpulkan dengan pengusiran air.
How difficult is Pengumpulan Gas Hidrogen?
This experiment is rated as Intermediate (High School). It takes approximately 35 minutes to complete.
What safety precautions are needed for Pengumpulan Gas Hidrogen?
Key safety precautions include: Hydrogen gas is extremely flammable — NO open flames nearby; HCl is corrosive; Work in a well-ventilated area.
What materials are needed for Pengumpulan Gas Hidrogen?
The main materials required are: Zinc granules, Hydrochloric acid (HCl), Distilled water.
What results should I expect from Pengumpulan Gas Hidrogen?
5 g Zn = 0.076 mol should produce 0.076 mol H₂ = ~1.9 L at STP. The collected volume should be close to this when corrected for temperature and water vapor pressure.