चीनी क्रिस्टल रॉक कैंडी

एक धागे पर खाने योग्य चीनी के क्रिस्टल उगाना

Crystallization Beginner (Middle School) 25 मिनट ~$4.00

उद्देश्य

अतिसंतृप्ति और नाभिकीकरण प्रदर्शित करते हुए एक खाने योग्य उत्पाद के साथ एक धागे पर बड़े चीनी (सुक्रोज) क्रिस्टल उगाएं।

पृष्ठभूमि

Rock candy is made by suspending a string in a supersaturated sugar solution and waiting for crystals to grow. Sugar is unusual in that it is extremely soluble in water (about 2 kg per liter at 100°C) and forms large monoclinic crystals with well-defined facets.

सुरक्षा चेतावनियाँ

  • Sugar syrup is extremely hot — burns risk
  • Supervise children during the boiling step

आवश्यक PPE

goggles

सामग्री

  • Granulated sugar (500 g)
    White sugar
  • Water (200 mL)
  • Cotton string (30 cm)
    Unbleached
  • Food coloring (5 drops)
    Optional
  • Flavoring extract (1 tsp)
    Optional

उपकरण

Saucepan Stove or hot plate Tall glass jar Pencil Clothespin

प्रक्रिया

1

Heat 200 mL water to boiling in the saucepan. Gradually dissolve 400-500 g sugar, stirring continuously.

10 मिनट Hot syrup — burns risk
2

Remove from heat. Add food coloring and flavoring if desired.

2 मिनट
3

Wet the cotton string with water and roll in granulated sugar to create nucleation sites. Let dry for a few hours.

3 मिनट
4

Pour the cooled (but still warm) sugar solution into the glass jar.

2 मिनट
5

Suspend the prepared string from a pencil across the top of the jar so it hangs in the solution without touching the sides or bottom.

3 मिनट
6

Cover loosely and place in a stable location. Check daily for 5-7 days. Crystals should grow along the string.

5 मिनट

अपेक्षित परिणाम

After 5-7 days, large sugar crystals (1-3 cm) should form along the string, creating rock candy. Crystals are monoclinic with flat, angled faces. The result is edible.

सफाई

Excess sugar solution can be reheated and reused. Wash all equipment with warm water.

विवरण

श्रेणी
Crystallization
कठिनाई
Beginner (Middle School)
अवधि
25 मिनट
अनुमानित लागत
$4.00
चरण
6
सामग्री
5

अधिक प्रयोग

अतिसंतृप्ति और तात्कालिक क्रिस्टलीकरण 35 min कॉपर सल्फेट क्रिस्टल उगाना 30 min नमक और रेत का खंडित क्रिस्टलीकरण 35 min फिटकरी क्रिस्टल उगाना 30 min बिस्मथ इंद्रधनुष क्रिस्टल उगाना 45 min बेंजोइक अम्ल का पुनःक्रिस्टलीकरण 45 min सैलोल (फेनाइल सैलिसिलेट) का क्रिस्टलीकरण 30 min

Frequently Asked Questions

What is the objective of चीनी क्रिस्टल रॉक कैंडी?
अतिसंतृप्ति और नाभिकीकरण प्रदर्शित करते हुए एक खाने योग्य उत्पाद के साथ एक धागे पर बड़े चीनी (सुक्रोज) क्रिस्टल उगाएं।
How difficult is चीनी क्रिस्टल रॉक कैंडी?
This experiment is rated as Beginner (Middle School). It takes approximately 25 minutes to complete.
What safety precautions are needed for चीनी क्रिस्टल रॉक कैंडी?
Key safety precautions include: Sugar syrup is extremely hot — burns risk; Supervise children during the boiling step.
What materials are needed for चीनी क्रिस्टल रॉक कैंडी?
The main materials required are: Granulated sugar, Water, Cotton string, Food coloring, Flavoring extract.
What results should I expect from चीनी क्रिस्टल रॉक कैंडी?
After 5-7 days, large sugar crystals (1-3 cm) should form along the string, creating rock candy. Crystals are monoclinic with flat, angled faces. The result is edible.