CO₂ और चूने के पानी का परीक्षण

कैल्शियम हाइड्रॉक्साइड से कार्बन डाइऑक्साइड का पता लगाना

Gas Laws Beginner (Middle School) 20 मिनट ~$5.00

उद्देश्य

कार्बोनेट-अम्ल अभिक्रिया से कार्बन डाइऑक्साइड गैस उत्पन्न करें और चूने के पानी के परीक्षण का उपयोग करके इसकी पहचान की पुष्टि करें।

पृष्ठभूमि

When baking soda (sodium bicarbonate) reacts with vinegar (acetic acid), CO₂ gas is produced. Bubbling this gas through limewater (calcium hydroxide solution) produces a characteristic white milky precipitate of calcium carbonate, confirming the presence of CO₂.

सुरक्षा चेतावनियाँ

  • Limewater is mildly irritating — avoid eye contact
  • CO₂ is an asphyxiant in large quantities — work in ventilated area

आवश्यक PPE

goggles

सामग्री

  • Baking soda (NaHCO₃) (10 g)
  • White vinegar (50 mL)
    5% acetic acid
  • Limewater (Ca(OH)₂ solution) (100 mL)
    Clear, saturated

उपकरण

Erlenmeyer flask (250 mL) Rubber stopper with delivery tube Test tubes Rubber tubing

प्रक्रिया

1

Pour 100 mL of clear limewater into a test tube or small beaker.

2 मिनट
2

Place 10 g of baking soda in the Erlenmeyer flask.

1 मिनट
3

Add 50 mL of vinegar to the flask. Quickly insert the stopper with delivery tube.

2 मिनट Vigorous effervescence
4

Direct the delivery tube into the limewater. Bubble the CO₂ through for 2-3 minutes.

3 मिनट
5

Observe the limewater turning milky white as calcium carbonate precipitate forms.

2 मिनट
6

Continue bubbling. If enough CO₂ passes through, the solution may turn clear again as soluble Ca(HCO₃)₂ forms.

5 मिनट

अपेक्षित परिणाम

The clear limewater turns milky white due to CaCO₃ precipitation: Ca(OH)₂ + CO₂ → CaCO₃ + H₂O. With excess CO₂, the milkiness clears: CaCO₃ + CO₂ + H₂O → Ca(HCO₃)₂.

सफाई

Neutralize remaining vinegar solution. Dispose of limewater down the drain. Rinse all equipment.

Frequently Asked Questions

What is the objective of CO₂ और चूने के पानी का परीक्षण?
कार्बोनेट-अम्ल अभिक्रिया से कार्बन डाइऑक्साइड गैस उत्पन्न करें और चूने के पानी के परीक्षण का उपयोग करके इसकी पहचान की पुष्टि करें।
How difficult is CO₂ और चूने के पानी का परीक्षण?
This experiment is rated as Beginner (Middle School). It takes approximately 20 minutes to complete.
What safety precautions are needed for CO₂ और चूने के पानी का परीक्षण?
Key safety precautions include: Limewater is mildly irritating — avoid eye contact; CO₂ is an asphyxiant in large quantities — work in ventilated area.
What materials are needed for CO₂ और चूने के पानी का परीक्षण?
The main materials required are: Baking soda (NaHCO₃), White vinegar, Limewater (Ca(OH)₂ solution).
What results should I expect from CO₂ और चूने के पानी का परीक्षण?
The clear limewater turns milky white due to CaCO₃ precipitation: Ca(OH)₂ + CO₂ → CaCO₃ + H₂O. With excess CO₂, the milkiness clears: CaCO₃ + CO₂ + H₂O → Ca(HCO₃)₂.