Therefore, this time Xu Yun chose a method of laboratory oxygen production that adhered to later standards.
That is, heating potassium permanganate to collect oxygen.
First, Xu Yun used Old Su's connections to find pyrolusite, a very common ore, which could be found in abundance in Bianjing City.
Then it was heated with potassium nitrate, producing potassium manganate.
Next, it was electrolyzed in an alkaline solution with an oxidant.
This way, potassium permanganate was obtained.
Huh?
You ask how the potassium nitrate was obtained?
Remember when preparing chlorine, the potassium nitrate salt bridge was made from saltpeter obtained through the sour plum soup shop? (See Chapter 123)
So it's still the same saying:
Xu Yun's invention of the generator and electrolytic cell was far from just a show-off endeavor.
Next, he instructed Siegfried to move the copper tube transmitting oxygen to the second-level entrance.
