Kristalisasi Fraksional Garam dan Pasir

Memisahkan campuran menggunakan perbedaan kelarutan

Crystallization Beginner (Middle School) 35 menit ~$3,00

Tujuan

Pisahkan campuran garam dan pasir menggunakan kristalisasi fraksional, mendemonstrasikan pelarutan, filtrasi, dan kristalisasi evaporatif.

Latar Belakang

This classic separation technique exploits the fact that salt dissolves in water while sand does not. The mixture is dissolved in hot water, filtered to remove sand, and then the salt is recovered by evaporation. This is fundamentally how salt has been harvested from seawater for millennia.

Peringatan Keselamatan

  • Handle hot evaporating dish with tongs
  • Do not heat to dryness too rapidly — spattering risk

APD yang Diperlukan

goggles

Bahan

  • Salt-sand mixture (10 g)
    Pre-mixed approximately 50:50
  • Distilled water (100 mL)

Peralatan

250 mL beaker Filter paper Funnel Evaporating dish Hot plate Stirring rod Analytical balance

Prosedur

1

Weigh 10 g of the salt-sand mixture and record the mass.

2 menit
2

Add the mixture to 100 mL of warm water in the beaker. Stir for 5 minutes to dissolve all the salt.

5 menit
3

Filter the mixture through filter paper. The sand remains on the filter; the salt solution passes through.

5 menit
4

Rinse the sand on the filter with a small amount of distilled water. Dry the sand and weigh it.

5 menit
5

Pour the filtrate into the evaporating dish. Heat gently on the hot plate to evaporate the water.

12 menit Remove from heat before completely dry
6

Once dry, weigh the recovered salt. Calculate the percentage of each component.

3 menit
7

Compare the total recovered mass with the initial mass. Calculate percent recovery.

3 menit

Hasil yang Diharapkan

The total mass of recovered salt + sand should be close to the original 10 g (typically 90-98% recovery). Some loss occurs during transfer and on filter paper. The separated components should be visually distinct.

Pembersihan

Salt solution can go down the drain. Sand can go in the trash. Rinse all glassware.

Detail

Kategori
Crystallization
Tingkat Kesulitan
Beginner (Middle School)
Durasi
35 menit
Perkiraan Biaya
$3,00
Langkah
7
Bahan
2

Eksperimen Lainnya

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 Permen Batu Kristal Gula 25 min Rekristalisasi Asam Benzoat 45 min

Frequently Asked Questions

What is the objective of Kristalisasi Fraksional Garam dan Pasir?
Pisahkan campuran garam dan pasir menggunakan kristalisasi fraksional, mendemonstrasikan pelarutan, filtrasi, dan kristalisasi evaporatif.
How difficult is Kristalisasi Fraksional Garam dan Pasir?
This experiment is rated as Beginner (Middle School). It takes approximately 35 minutes to complete.
What safety precautions are needed for Kristalisasi Fraksional Garam dan Pasir?
Key safety precautions include: Handle hot evaporating dish with tongs; Do not heat to dryness too rapidly — spattering risk.
What materials are needed for Kristalisasi Fraksional Garam dan Pasir?
The main materials required are: Salt-sand mixture, Distilled water.
What results should I expect from Kristalisasi Fraksional Garam dan Pasir?
The total mass of recovered salt + sand should be close to the original 10 g (typically 90-98% recovery). Some loss occurs during transfer and on filter paper. The separated components should be visually distinct.