For our lithium from phone batteries extraction we planned in the last video, we're going to need some nitric acid.
We can make this with a relatively simple (but intricate) reaction between potassium nitrate and sodium bisulfate, which generates red fuming nitric acid ready for distillation.
Ideally, I've made enough nitric acid to last a while, so hopefully I won't have to do this again for a long time.

If you want to see more detail on this process, you can check out Nurdrage's video on the topic here:
   • Make Nitric Acid from Sodium Bisulfat...