Magnezyumlu Gaz Stokiyometrisi

Mg ve HCl tepkimesiyle molar hacmi hesaplama

Gas Laws Intermediate (High School) 40 dak ~$8,00

Hedef

Bilinen kütlede magnezyum şeridini aşırı hidroklorik asitle tepkimeye sokarak oda koşullarında hidrojen gazının molar hacmini belirlemek.

Arka Plan

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).

Güvenlik Uyarıları

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

Gerekli KKD

goggles gloves lab_coat

Malzemeler

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

Ekipman

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

Prosedür

1

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

3 dak
2

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

3 dak
3

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

5 dak Handle acid carefully
4

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

10 dak No flames nearby
5

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

3 dak
6

Record room temperature and atmospheric pressure.

2 dak
7

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

8 dak

Beklenen Sonuçlar

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%).

Temizlik

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

Ayrıntılar

Kategori
Gas Laws
Zorluk
Intermediate (High School)
Süre
40 dak
Tahmini Maliyet
$8,00
Adımlar
7
Malzemeler
3

Daha Fazla Deney

Balonla Charles Yasası 30 min Boyle Yasasının Doğrulanması 40 min Buhar Basıncı ve Kaynama Noktası 45 min CO₂ ve Kireç Suyu Testi 20 min Difüzyon Hızı Karşılaştırması (Graham Yasası) 30 min Hidrojen Gazı Toplama 35 min Kartezyen Dalgıcı 15 min STP'de Gazın Molar Hacmi 35 min

Frequently Asked Questions

What is the objective of Magnezyumlu Gaz Stokiyometrisi?
Bilinen kütlede magnezyum şeridini aşırı hidroklorik asitle tepkimeye sokarak oda koşullarında hidrojen gazının molar hacmini belirlemek.
How difficult is Magnezyumlu Gaz Stokiyometrisi?
This experiment is rated as Intermediate (High School). It takes approximately 40 minutes to complete.
What safety precautions are needed for Magnezyumlu Gaz Stokiyometrisi?
Key safety precautions include: HCl is corrosive; Hydrogen is flammable — no flames; Handle glassware carefully.
What materials are needed for Magnezyumlu Gaz Stokiyometrisi?
The main materials required are: Magnesium ribbon, Hydrochloric acid (HCl), Distilled water.
What results should I expect from Magnezyumlu Gaz Stokiyometrisi?
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%).