Cultivo de Cristales de Sulfato de Cobre

Producción de grandes cristales azules por evaporación lenta

Crystallization Beginner (Middle School) 30 min ~$8,00

Objetivo

Cultivar grandes cristales bien formados de sulfato de cobre pentahidratado usando el método de evaporación lenta, demostrando la supersaturación y la formación de redes cristalinas.

Antecedentes

Copper sulfate pentahydrate (CuSO₄·5H₂O) forms beautiful blue triclinic crystals. By preparing a saturated solution and allowing it to evaporate slowly over several days, large single crystals can be grown. The process demonstrates concepts of solubility, supersaturation, and crystal nucleation.

Advertencias de seguridad

  • Copper sulfate is toxic if ingested
  • Wear gloves when handling the solution
  • Wash hands thoroughly after the experiment
  • Do not dispose of copper sulfate down the drain

EPP requerido

goggles gloves

Materiales

  • Copper(II) sulfate pentahydrate (50 g)
    Blue crystals
  • Distilled water (200 mL)
    Hot
  • Thread or fishing line (30 cm)
    For seed crystal
  • Pencil or stick (1)
    To suspend seed crystal

Equipamiento

400 mL beaker Hot plate Stirring rod Filter paper Funnel

Procedimiento

1

Heat 200 mL of distilled water to 60-70°C. Add copper sulfate gradually while stirring until no more dissolves (saturated solution).

10 min Wear gloves — copper sulfate is toxic
2

Filter the hot saturated solution through filter paper to remove any undissolved particles.

5 min
3

Pour a small amount into a petri dish and allow it to cool. Select the best small crystal as a seed crystal after 24 hours.

5 min
4

Tie the seed crystal to a thread and suspend it from a pencil placed across the top of the beaker of saturated solution.

5 min
5

Cover the beaker loosely with filter paper to allow slow evaporation. Place in a vibration-free location.

2 min
6

Check daily for crystal growth. Remove any small crystals that form on the thread or beaker walls.

3 min

Resultados esperados

After 1-2 weeks, the seed crystal should grow into a large blue crystal (1-3 cm) with well-defined facets. The crystal has a triclinic shape with distinct flat faces. Faster evaporation produces many small crystals; slower produces fewer, larger ones.

Limpieza

Collect excess copper sulfate solution and solid for reuse or proper disposal in heavy metal waste. Do not pour down the drain.

Detalles

Categoría
Crystallization
Dificultad
Beginner (Middle School)
Duración
30 min
Costo estimado
$8,00
Pasos
6
Materiales
4

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Frequently Asked Questions

What is the objective of Cultivo de Cristales de Sulfato de Cobre?
Cultivar grandes cristales bien formados de sulfato de cobre pentahidratado usando el método de evaporación lenta, demostrando la supersaturación y la formación de redes cristalinas.
How difficult is Cultivo de Cristales de Sulfato de Cobre?
This experiment is rated as Beginner (Middle School). It takes approximately 30 minutes to complete.
What safety precautions are needed for Cultivo de Cristales de Sulfato de Cobre?
Key safety precautions include: Copper sulfate is toxic if ingested; Wear gloves when handling the solution; Wash hands thoroughly after the experiment.
What materials are needed for Cultivo de Cristales de Sulfato de Cobre?
The main materials required are: Copper(II) sulfate pentahydrate, Distilled water, Thread or fishing line, Pencil or stick.
What results should I expect from Cultivo de Cristales de Sulfato de Cobre?
After 1-2 weeks, the seed crystal should grow into a large blue crystal (1-3 cm) with well-defined facets. The crystal has a triclinic shape with distinct flat faces. Faster evaporation produces many small crystals; slower produces fewer, larger ones.