Sintesis Minyak Pisang (Isoamil Asetat)

Membuat ester yang bertanggung jawab atas rasa pisang

Organic Synthesis Advanced (University) 90 menit ~$22,00

Tujuan

Sintesis isoamil asetat (minyak pisang) melalui esterifikasi Fischer asam asetat dan isoamil alkohol, mendemonstrasikan bagaimana ester menciptakan rasa buah.

Latar Belakang

Isoamyl acetate is the ester responsible for the characteristic smell of bananas. It is synthesized by the acid-catalyzed reaction of isoamyl alcohol with acetic acid. This experiment demonstrates ester formation, liquid-liquid extraction, and the connection between molecular structure and sensory properties.

Peringatan Keselamatan

  • Concentrated H₂SO₄ is extremely corrosive
  • Glacial acetic acid causes burns
  • Isoamyl alcohol is flammable
  • Work in a fume hood throughout

APD yang Diperlukan

goggles gloves lab_coat

Bahan

  • Isoamyl alcohol (3-methyl-1-butanol) (5 mL)
  • Glacial acetic acid (7 mL)
    Excess
  • Sulfuric acid (H₂SO₄) (1 mL)
    Concentrated, catalyst
  • Sodium bicarbonate solution (50 mL)
    5%
  • Anhydrous sodium sulfate (5 g)
    Drying agent

Peralatan

Round-bottom flask (100 mL) Reflux condenser Heating mantle Separating funnel Boiling chips

Prosedur

1

Add 5 mL isoamyl alcohol and 7 mL glacial acetic acid to the round-bottom flask with boiling chips.

3 menit Fume hood required
2

Slowly add 1 mL concentrated H₂SO₄ as catalyst.

2 menit Add very slowly — exothermic
3

Attach reflux condenser and heat at gentle reflux for 60 minutes.

60 menit Ensure condenser water flows
4

Cool and transfer to a separating funnel. Add 25 mL water and shake.

3 menit
5

Wash the organic layer with 25 mL of 5% NaHCO₃. Vent frequently.

5 menit CO₂ produced — vent
6

Dry the organic layer over Na₂SO₄ for 10 minutes. Filter and smell by wafting.

12 menit Waft — do not sniff directly
7

Calculate the yield and record the banana-like aroma.

5 menit

Hasil yang Diharapkan

A clear, pale yellow liquid with a strong banana aroma (isoamyl acetate). Typical yield is 50-65%. The unmistakable banana smell confirms successful ester formation.

Pembersihan

Dispose of organic waste in designated containers. Neutralize acid waste. Rinse glassware with acetone then water.

Detail

Kategori
Organic Synthesis
Tingkat Kesulitan
Advanced (University)
Durasi
90 menit
Perkiraan Biaya
$22,00
Langkah
7
Bahan
5

Eksperimen Lainnya

Ekstraksi Kafein dari Teh 90 min Esterifikasi Fischer Etil Asetat 90 min Kondensasi Aldol (Dibenzalaseton) 75 min Pembuatan Nilon 6,10 (Trik Tali Nilon) 30 min Pembuatan Sabun dengan Saponifikasi 60 min Preparasi Asetaminofen (Parasetamol) 80 min Produksi Biodiesel dari Minyak Nabati 60 min Sintesis Aspirin (Asam Asetilsalisilat) 90 min Sintesis Lendir (PVA Terikat Silang) 20 min Sintesis Luminol 120 min

Frequently Asked Questions

What is the objective of Sintesis Minyak Pisang (Isoamil Asetat)?
Sintesis isoamil asetat (minyak pisang) melalui esterifikasi Fischer asam asetat dan isoamil alkohol, mendemonstrasikan bagaimana ester menciptakan rasa buah.
How difficult is Sintesis Minyak Pisang (Isoamil Asetat)?
This experiment is rated as Advanced (University). It takes approximately 90 minutes to complete.
What safety precautions are needed for Sintesis Minyak Pisang (Isoamil Asetat)?
Key safety precautions include: Concentrated H₂SO₄ is extremely corrosive; Glacial acetic acid causes burns; Isoamyl alcohol is flammable.
What materials are needed for Sintesis Minyak Pisang (Isoamil Asetat)?
The main materials required are: Isoamyl alcohol (3-methyl-1-butanol), Glacial acetic acid, Sulfuric acid (H₂SO₄), Sodium bicarbonate solution, Anhydrous sodium sulfate.
What results should I expect from Sintesis Minyak Pisang (Isoamil Asetat)?
A clear, pale yellow liquid with a strong banana aroma (isoamyl acetate). Typical yield is 50-65%. The unmistakable banana smell confirms successful ester formation.