हाइड्रोजन गैस संग्रहण
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जस्ते और अम्ल से हाइड्रोजन उत्पन्न करना और संग्रहित करना
उद्देश्य
जस्ते की हाइड्रोक्लोरिक अम्ल के साथ अभिक्रिया से हाइड्रोजन गैस उत्पन्न करें और जल विस्थापन द्वारा इसे संग्रहित करें।
पृष्ठभूमि
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.
सुरक्षा चेतावनियाँ
- 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
आवश्यक PPE
सामग्री
-
Zinc granules (5 g)
-
Hydrochloric acid (HCl) (50 mL)2M
-
Distilled water (500 mL)
उपकरण
प्रक्रिया
Fill the pneumatic trough with water. Fill the graduated cylinder with water, invert it, and place it in the trough.
Place 5 g zinc granules in the Erlenmeyer flask.
Add 50 mL of 2M HCl to the flask. Quickly insert the rubber stopper with delivery tube.
Direct the delivery tube under the inverted graduated cylinder. Collect the hydrogen gas by water displacement.
When the reaction slows, record the volume of gas collected. Note temperature and atmospheric pressure.
Optionally, perform the squeaky pop test: bring a lit splint near a small collection of H₂.
Calculate moles of H₂ using ideal gas law and compare with moles predicted from zinc mass.
अपेक्षित परिणाम
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.
सफाई
Neutralize remaining acid with sodium bicarbonate. Dispose of zinc chloride solution down the drain. Rinse all equipment.
विवरण
- श्रेणी
- Gas Laws
- कठिनाई
- Intermediate (High School)
- अवधि
- 35 मिनट
- अनुमानित लागत
- $10.00
- चरण
- 7
- सामग्री
- 3