SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Hatari
Hydrogen Cyanide (Anhydrous) by Wöhler's Method
Anhydrous hydrogen cyanide (prussic acid) is a clear liquid and a deadly poison. Crawford's 1936 patent turns it into acetone cyanohydrin, the start of acrylic glass. This is Wöhler's laboratory method as the 1907 US Dispensatory gives it: fuse potassium ferrocyanide to a black cyanide, set the acid free with diluted sulphuric acid, dry the vapour over calcium chloride and distil it into an ice-cold bottle. The source gives no strength for the acid: none is given here.
The picture: pure liquid hydrogen cyanide in a glass ampoule (Pok, Wikimedia Commons, CC BY-SA 4.0).
Juu
1 day
Maudhui hatari
Blueprint hii ina taratibu za hatari. Ingia na uwashe maudhui ya hatari katika mipangilio ya akaunti yako ili kuona maagizo ya hatua kwa hatua.
IngiaMchoro huu unatengeneza
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.