UBUCIKO
UBUHLE NEMPILO
UBUCIKO BEZANDLA
AMASIKO NOMLANDO
EZOKUZIJABULISA
IMVELO
UKUDLA NEZIPHUZO
REVERSE ENGINEERING
IZAYENSI
EZEMIDLALO
UBUCHWEPHESHE
IZINTO EZIGQOKWAYO
Yingozi
Hydrogen Fluoride Gas from Fluorspar and Sulphuric Acid
Hydrogen fluoride is the gas that fluorspar gives off when it is warmed with strong sulphuric acid; in water it is hydrofluoric acid. Thorpe (1912): one part of powdered fluorspar and about twice its weight of strong sulphuric acid in a lead retort on a sand bath. Here the gas is led off through lead to where it is used. It eats glass, so only lead or copper touches it. Hydrogen fluoride is a deadly poison and its burns go deep: full protection, outdoors, never alone.
The picture: our diagram.
Osezingeni eliphezulu
Half a day
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