Kerjasama
SENI
KECANTIKAN & KESEJAHTERAAN
KRAFTANGAN
BUDAYA & SEJARAH
HIBURAN
ALAM SEKITAR
MAKANAN & MINUMAN
KEJURUTERAAN TERBALIK
SAINS
SUKAN
TEKNOLOGI
BOLEH PAKAI
Benzoic Acid: Sublimed from Gum Benzoin into a Paper Cone at 170 °C (Mohr, after Thorpe 1912)
Charlie

Dicipta oleh

Charlie

30. Oktober 2026DE
10
0
0
0
0

Benzoic Acid: Sublimed from Gum Benzoin into a Paper Cone at 170 °C (Mohr, after Thorpe 1912)

Gum benzoin, the fragrant resin of Styrax trees, holds benzoic acid that rises as a vapour when gently heated. Mohr's way lets it pass through filter paper into a paper cone, where it settles as crystals. Result: colourless crystals of benzoic acid smelling slightly of vanilla, about 4 % of the gum. Source: Thorpe, Dictionary of Applied Chemistry, vol. 1 (1912), Benzoic acid (Mohr, Annalen 29, 177). Picture drawn by Youblob.
Pemula
4 hours

Arahan

1

Break the gum into small pieces

Break gum benzoin into small pieces and put them in a flat iron vessel.

Bahan untuk langkah ini:

KemenyanKemenyan100 parts by weight

Alatan diperlukan:

Lesung dan AluLesung dan Alu
Mangkuk besi tuangMangkuk besi tuang
2

Paste filter paper over it and tie on a paper cone

Paste filter paper over the mouth of the vessel. Over it place a large conical cap of strong paper that fits the vessel exactly, and tie it round the rim.

Alatan diperlukan:

Kertas TurasKertas Turas
Rol kertas kraf (perang)Rol kertas kraf (perang)
Tali KapasTali Kapas
3

Heat gently on a sand bath at about 170 °C

Heat gently over a sand bath at about 170 °C. The benzoic acid sublimes through the filter paper and collects as crystals inside the cone. A pound of acid takes three to four hours.

Alatan diperlukan:

Rendaman pasirRendaman pasir
TermometerTermometer
4

Take the crystals out of the cone

At the end, remove the colourless crystals from the paper cone. The yield is about 4 % of the gum. Ours: keep them in a closed jar.

Alatan diperlukan:

Balang Kaca BertutupBalang Kaca Bertutup

Bahan

1
  • 100 parts by weight
    Pemegang Tempat

Alatan Diperlukan

8

CC0 Domain Awam

Blueprint ini dikeluarkan di bawah CC0. Anda bebas menyalin, mengubah, mengedar, dan menggunakan karya ini untuk sebarang tujuan, tanpa meminta kebenaran.

Sokong Pembuat dengan membeli produk melalui Blueprint mereka di mana mereka memperoleh Komisen Pembuat ditetapkan oleh Penjual, atau cipta iterasi baru Blueprint ini dan sertakan ia sebagai sambungan dalam Blueprint anda sendiri untuk berkongsi hasil.

Perbincangan

(0)

Log masuk untuk menyertai perbincangan

Memuatkan komen...