CO₂ और चूने के पानी का परीक्षण
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कैल्शियम हाइड्रॉक्साइड से कार्बन डाइऑक्साइड का पता लगाना
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
सामग्री
-
Baking soda (NaHCO₃) (10 g)
-
White vinegar (50 mL)5% acetic acid
-
Limewater (Ca(OH)₂ solution) (100 mL)Clear, saturated
उपकरण
प्रक्रिया
Pour 100 mL of clear limewater into a test tube or small beaker.
Place 10 g of baking soda in the Erlenmeyer flask.
Add 50 mL of vinegar to the flask. Quickly insert the stopper with delivery tube.
Direct the delivery tube into the limewater. Bubble the CO₂ through for 2-3 minutes.
Observe the limewater turning milky white as calcium carbonate precipitate forms.
Continue bubbling. If enough CO₂ passes through, the solution may turn clear again as soluble Ca(HCO₃)₂ forms.
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.
विवरण
- श्रेणी
- Gas Laws
- कठिनाई
- Beginner (Middle School)
- अवधि
- 20 मिनट
- अनुमानित लागत
- $5.00
- चरण
- 6
- सामग्री
- 3