Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Akaga
Isatin: Indigo Oxidised with Nitric Acid (Erdmann, Cohen 1920)
Indigo boiled with dilute nitric acid breaks into isatin, which dissolves in the hot water and crystallises out red, leaving tar behind. 100 g of indigo gives about 10 g of isatin.
Isatin forms red prisms melting at 201 °C, soluble in hot water and alcohol. With strong sulphuric acid and benzene it turns blue if thiophene is present.
Not given: the strength and amount of the potash, and how much acid the purification takes.
Source: J. B. Cohen, Practical Organic Chemistry (1920), Preparation 111, after Erdmann (1841). Picture: our drawing.
Hejuru
Unknown
Ibirimo biteje akaga
Iki gikorwa kirimo imikorere yangiza. Injira hanyuma ufungure ibikoresho byangiza mu igenamiterere ryawe kugira ngo urebe amabwiriza.
InjiraIki gishushanyo gikora
CC0 Umurenge rusange
Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.
Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.