비누화 반응으로 비누 만들기

수산화나트륨으로 지방을 비누로 변환하기

Organic Synthesis Intermediate (High School) 60 분 ~$10.00

목표

식물성 기름을 수산화나트륨으로 비누화하여 비누를 만들고, 트리글리세리드의 에스테르 결합 가수분해를 실증한다.

배경

Saponification is the base-catalyzed hydrolysis of a fat or oil (triglyceride) to produce glycerol and soap (sodium salts of fatty acids). This ancient chemical reaction is the basis of all soap manufacturing and demonstrates ester bond cleavage.

안전 경고

  • Concentrated NaOH is extremely corrosive
  • Wear nitrile gloves and goggles at all times
  • Hot oil and NaOH can cause severe burns
  • Do not use the soap on skin until it has fully cured (4-6 weeks)

필수 개인 보호 장비

goggles gloves lab_coat

재료

  • Vegetable oil (olive or coconut) (20 mL)
  • Sodium hydroxide (NaOH) (10 mL)
    6M solution
  • Ethanol (10 mL)
    To help mix oil and base
  • Sodium chloride (NaCl) (15 g)
    Saturated solution for salting out
  • Distilled water (100 mL)

장비

250 mL beaker Hot plate Glass stirring rod Cheesecloth or filter Mold (small cup)

실험 절차

1

Heat 20 mL of vegetable oil in the beaker to about 40°C on the hot plate.

3 분
2

Mix 10 mL of 6M NaOH with 10 mL ethanol in a separate container.

2 분 NaOH is corrosive
3

Slowly add the NaOH/ethanol mixture to the warm oil while stirring continuously.

3 분 Hot caustic mixture
4

Continue heating and stirring at 60-70°C for 20 minutes until the mixture becomes thick and opaque (trace).

20 분
5

Add 50 mL of saturated NaCl solution to salt out the soap. Stir and allow to cool.

10 분
6

Filter the solid soap through cheesecloth. Press out excess liquid.

5 분
7

Mold the soap into a shape and allow to dry for 24 hours.

3 분 Do not use on skin until fully cured
8

Test a small piece by dissolving in warm water — it should produce lather.

3 분

예상 결과

A solid, white to cream-colored soap that lathers when dissolved in water. The soap may feel slightly slippery, indicating successful saponification. Full curing takes 4-6 weeks to neutralize any remaining NaOH.

정리

Neutralize any remaining NaOH solution with vinegar before disposal. Rinse all glassware. Wipe down work surfaces.

세부 정보

카테고리
Organic Synthesis
난이도
Intermediate (High School)
소요 시간
60 분
예상 비용
$10.00
단계
8
재료
5

더 많은 실험

아세트산에틸의 피셔 에스테르화 90 min 아세트아미노펜(파라세타몰) 조제 80 min 아스피린(아세틸살리실산) 합성 90 min 루미놀 합성 120 min 식물성 기름에서 바이오디젤 생산 60 min 차에서 카페인 추출 90 min 바나나 오일(아세트산이소아밀) 합성 90 min 알돌 축합(디벤잘아세톤) 75 min 나일론 6,10 합성(나일론 로프 트릭) 30 min 슬라임 합성(가교 PVA) 20 min

Frequently Asked Questions

What is the objective of 비누화 반응으로 비누 만들기?
식물성 기름을 수산화나트륨으로 비누화하여 비누를 만들고, 트리글리세리드의 에스테르 결합 가수분해를 실증한다.
How difficult is 비누화 반응으로 비누 만들기?
This experiment is rated as Intermediate (High School). It takes approximately 60 minutes to complete.
What safety precautions are needed for 비누화 반응으로 비누 만들기?
Key safety precautions include: Concentrated NaOH is extremely corrosive; Wear nitrile gloves and goggles at all times; Hot oil and NaOH can cause severe burns.
What materials are needed for 비누화 반응으로 비누 만들기?
The main materials required are: Vegetable oil (olive or coconut), Sodium hydroxide (NaOH), Ethanol, Sodium chloride (NaCl), Distilled water.
What results should I expect from 비누화 반응으로 비누 만들기?
A solid, white to cream-colored soap that lathers when dissolved in water. The soap may feel slightly slippery, indicating successful saponification. Full curing takes 4-6 weeks to neutralize any remaining NaOH.