Request, drop a pill into fizz water and recorde the disslove. I recorded the whole process: open the pill, open the bottle, drop the pill several times, fill the glas with pop-water, drop the pill and waiting for dissolve.
The sound was recorded with a yeti blue microphone in my room (which is not soundproofed). It is a recording of a turkey baster dropping water into a bowl full of water. Sound has many patterns of water droplets.