C473 The Mercury Was in His Hands to Prepare Sulfuric Acid

Gradually, the amount of mercury in the glassware below increased, but the amount of mercury flowing out of the iron pot decreased.

Qin Feng knew that this meant that the mercury sulfide in the iron wok had more or less reacted.

This time, Qin Feng prepared five hundred kilograms of cinnabar ore. This way, he refined a pot of cinnabar, which was around fifty kilograms.

In other words