SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Hatari
Oxalic Acid: Wood Soaked in Caustic Alkali and Heated in Hot Air at 300 °C (Plater-Syberg)
Oxalic acid from wood by Plater-Syberg's process (English Patent 23682, 1893), as Thorpe's Dictionary (1913) gives it: wood soaked in caustic alkali is heated in hot air. At about 120 °C it gives mostly acetic acid; at about 300 °C with more air, almost only oxalate. The oxalate is turned into calcium oxalate, which sulphuric acid breaks up to oxalic acid. Hot caustic and strong acid burn: goggles, gloves.
The picture: our diagram.
Juu
3 days
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.