How to make "Aqua Regia" in the lab conditions? Which lab equipment must be used?
$\begingroup$
$\endgroup$
Add a comment
|
1 Answer
$\begingroup$
$\endgroup$
4
Typically, 1 part of concentrated nitric acid is added to 3 parts of concentrated hydrochloric acid.
- Personal protection (goggles, gloves, lab coat) is vital.
- Prepare and use it under a well-vented fumehood only - hands inside the fumehood, head outside!
UPDATE
The comment of Crystal Lettuce is very important and points to a crucial aspect:
Aqua regia isn't a mixture to keep bottled on the shelf: it has to be prepared and used immediately!
answered Mar 13, 2015 at 14:11
-
2$\begingroup$ I would like to add: The vessel you prepare it in, should not be closed for several hours after combining the acids. A large amount of gas is produced which led to accidents in the past. $\endgroup$ Commented Mar 13, 2015 at 14:14
-
1$\begingroup$ Indeed, it should be prepared in small amounts and only what's needed for a particular procedure (or cleaning). Even after use, the remaining material is highly potent. $\endgroup$ Commented Mar 13, 2015 at 15:29
-
1$\begingroup$ There are also multiple guides to handling aqua regia safely. Notably, use only glass containers, funnels, etc. and add the nitric acid slowly to the HCl in the hood. The acids will become very hot. Neutralize with weak base (e.g., sodium bicarbonate) slowly. $\endgroup$ Commented Mar 13, 2015 at 15:33
-
$\begingroup$ I want to add that aqua regia will eat most latex and nitrile gloves. You will want some think butyl gloves for this. $\endgroup$ Commented Mar 14, 2015 at 0:10