मैग्नीशियम के साथ गैस रससमीकरण

Mg को HCl के साथ अभिक्रिया कराकर मोलर आयतन की गणना

Gas Laws Intermediate (High School) 40 मिनट ~$8.00

उद्देश्य

अतिरिक्त हाइड्रोक्लोरिक अम्ल के साथ मैग्नीशियम रिबन के ज्ञात द्रव्यमान की अभिक्रिया करके कमरे की स्थिति में हाइड्रोजन गैस का मोलर आयतन निर्धारित करें।

पृष्ठभूमि

When magnesium reacts with HCl, hydrogen gas is produced: Mg + 2HCl → MgCl₂ + H₂. By measuring the mass of Mg used and the volume of H₂ collected, the molar volume at room conditions can be calculated and compared with the theoretical value at STP (22.4 L/mol).

सुरक्षा चेतावनियाँ

  • HCl is corrosive
  • Hydrogen is flammable — no flames
  • Handle glassware carefully

आवश्यक PPE

goggles gloves lab_coat

सामग्री

  • Magnesium ribbon (0.1 g)
    Accurately weighed
  • Hydrochloric acid (HCl) (30 mL)
    2M, excess
  • Distilled water (500 mL)

उपकरण

Eudiometer tube or graduated cylinder (50 mL) Pneumatic trough Copper wire cage Rubber stopper Analytical balance Thermometer Barometer

प्रक्रिया

1

Weigh a 3-4 cm strip of magnesium ribbon accurately. Record mass to 0.001 g.

3 मिनट
2

Roll the Mg ribbon and secure it in a copper wire cage attached to a rubber stopper.

3 मिनट
3

Fill the eudiometer tube with 2M HCl. Insert the stopper+Mg assembly, inverting the tube into the trough.

5 मिनट Handle acid carefully
4

Allow the reaction to complete. All the Mg should dissolve, producing H₂ gas that collects at the top.

10 मिनट No flames nearby
5

Equalize water levels inside and outside the tube. Read the gas volume at the meniscus.

3 मिनट
6

Record room temperature and atmospheric pressure.

2 मिनट
7

Correct for water vapor pressure. Calculate moles of H₂ from Mg mass. Determine molar volume.

8 मिनट

अपेक्षित परिणाम

0.1 g Mg = 0.00411 mol, producing 0.00411 mol H₂. At room conditions (~25°C, 1 atm), volume should be about 100 mL. Calculated molar volume at STP should be approximately 22.4 L/mol (±5%).

सफाई

Neutralize remaining HCl with NaHCO₃. Dispose down the drain. Rinse all equipment.

Frequently Asked Questions

What is the objective of मैग्नीशियम के साथ गैस रससमीकरण?
अतिरिक्त हाइड्रोक्लोरिक अम्ल के साथ मैग्नीशियम रिबन के ज्ञात द्रव्यमान की अभिक्रिया करके कमरे की स्थिति में हाइड्रोजन गैस का मोलर आयतन निर्धारित करें।
How difficult is मैग्नीशियम के साथ गैस रससमीकरण?
This experiment is rated as Intermediate (High School). It takes approximately 40 minutes to complete.
What safety precautions are needed for मैग्नीशियम के साथ गैस रससमीकरण?
Key safety precautions include: HCl is corrosive; Hydrogen is flammable — no flames; Handle glassware carefully.
What materials are needed for मैग्नीशियम के साथ गैस रससमीकरण?
The main materials required are: Magnesium ribbon, Hydrochloric acid (HCl), Distilled water.
What results should I expect from मैग्नीशियम के साथ गैस रससमीकरण?
0.1 g Mg = 0.00411 mol, producing 0.00411 mol H₂. At room conditions (~25°C, 1 atm), volume should be about 100 mL. Calculated molar volume at STP should be approximately 22.4 L/mol (±5%).