出典:Wikipedia
出典:『Wikipedia』 (2011/06/23 19:59 UTC 版)
Aqua fortis, or "strong water," in alchemy, is a solution of nitric acid (HNO3) in water. Being highly corrosive, the solution was used in alchemy for dissolving silver and most other metals with the notable exception of gold, which can only be dissolved using aqua regia. Aqua fortis was prepared by mixing either sand, alum, or vitriol, or the last two together, with saltpeter, then distilling it by a hot fire. The gas collected from this condenses into aqua fortis. It was first described by the alchemist Pseudo-Geber.
water starworts
ミズイモ
ハゼリソウ
水のあわ
a water-basin (for flower-arrangement)
water repellence