황산구리 결정 키우기

서냉 증발로 큰 파란색 결정 만들기

Crystallization Beginner (Middle School) 30 분 ~$8.00

목표

서냉 증발법을 사용하여 크고 잘 형성된 황산구리 오수화물 결정을 키우고 과포화와 결정 격자 형성을 실증한다.

배경

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.

안전 경고

  • 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

필수 개인 보호 장비

goggles gloves

재료

  • 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

장비

400 mL beaker Hot plate Stirring rod Filter paper Funnel

실험 절차

1

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

10 분 Wear gloves — copper sulfate is toxic
2

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

5 분
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 분
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 분
5

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

2 분
6

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

3 분

예상 결과

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.

정리

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

세부 정보

카테고리
Crystallization
난이도
Beginner (Middle School)
소요 시간
30 분
예상 비용
$8.00
단계
6
재료
4

더 많은 실험

비스무트 무지개빛 결정 키우기 45 min 안식향산 재결정 정제 45 min 과포화와 순간 결정화 35 min 소금과 모래의 분별 결정화 35 min 명반 결정 키우기 30 min 설탕 결정(락캔디) 25 min 살롤(살리실산페닐) 결정화 30 min

Frequently Asked Questions

What is the objective of 황산구리 결정 키우기?
서냉 증발법을 사용하여 크고 잘 형성된 황산구리 오수화물 결정을 키우고 과포화와 결정 격자 형성을 실증한다.
How difficult is 황산구리 결정 키우기?
This experiment is rated as Beginner (Middle School). It takes approximately 30 minutes to complete.
What safety precautions are needed for 황산구리 결정 키우기?
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 황산구리 결정 키우기?
The main materials required are: Copper(II) sulfate pentahydrate, Distilled water, Thread or fishing line, Pencil or stick.
What results should I expect from 황산구리 결정 키우기?
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.