[znaes97]

Hello everybody,
I need to produce a solution that is (by volume) 2.3% concentrated nitric, 66% concentrated hydrochloric, and 27% concentrated ferric chloride. In other words, for nitric for example, 2.3% of the volume is of 68% nitric, not 2.3% by volume total. Anyway, what is the best way/proper order to produce this solution? I know when mixing nitric and HCl by themselves, you add the nitric to the HCl, but what would the proper order be including the ferric chloride? Thanks in advance!

[Hunter2]

Use iron chloride first add the hydrochloric and then the nitric.
For what do you need this mixture?

[znaes97]

Use iron chloride first add the hydrochloric and then the nitric.
For what do you need this mixture?

Perfect, thank you.

We are trying to produce a stainless steel etchant for aerospace applications. This was one of the recommended formulations we were given.