Permen Batu Kristal Gula

Menumbuhkan kristal gula yang dapat dimakan di tali

Crystallization Beginner (Middle School) 25 menit ~$4,00

Tujuan

Tumbuhkan kristal gula (sukrosa) besar di tali untuk membuat permen batu, mendemonstrasikan lewat jenuh dan nukleasi dengan produk yang dapat dimakan.

Latar Belakang

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.

Peringatan Keselamatan

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

APD yang Diperlukan

goggles

Bahan

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

Peralatan

Saucepan Stove or hot plate Tall glass jar Pencil Clothespin

Prosedur

1

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

10 menit Hot syrup — burns risk
2

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

2 menit
3

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

3 menit
4

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

2 menit
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 menit
6

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

5 menit

Hasil yang Diharapkan

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.

Pembersihan

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

Detail

Kategori
Crystallization
Tingkat Kesulitan
Beginner (Middle School)
Durasi
25 menit
Perkiraan Biaya
$4,00
Langkah
6
Bahan
5

Eksperimen Lainnya

Kristalisasi Fraksional Garam dan Pasir 35 min Kristalisasi Salol (Fenil Salisilat) 30 min Lewat Jenuh dan Kristalisasi Seketika 35 min Menumbuhkan Kristal Pelangi Bismut 45 min Menumbuhkan Kristal Tawas 30 min Menumbuhkan Kristal Tembaga Sulfat 30 min Rekristalisasi Asam Benzoat 45 min

Frequently Asked Questions

What is the objective of Permen Batu Kristal Gula?
Tumbuhkan kristal gula (sukrosa) besar di tali untuk membuat permen batu, mendemonstrasikan lewat jenuh dan nukleasi dengan produk yang dapat dimakan.
How difficult is Permen Batu Kristal Gula?
This experiment is rated as Beginner (Middle School). It takes approximately 25 minutes to complete.
What safety precautions are needed for Permen Batu Kristal Gula?
Key safety precautions include: Sugar syrup is extremely hot — burns risk; Supervise children during the boiling step.
What materials are needed for Permen Batu Kristal Gula?
The main materials required are: Granulated sugar, Water, Cotton string, Food coloring, Flavoring extract.
What results should I expect from Permen Batu Kristal Gula?
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.