The taste and flavor of common chemical reagents, unbelievably, someone managed to survive and write about it...

HCl (Hydrochloric Acid)

Dilute: Relatively acidic, with a slippery sensation in the mouth, typical of vomit, slightly spicy.

Concentrated: Extremely acidic, leaving a bitter aftertaste after spitting it out, then a cooling sensation throughout the mouth, improving after 10 minutes.

H2SO4 (Sulfuric Acid)

Dilute: A faintly sour taste, with an oily aftertaste, slightly warm, sweet, and no discomfort at all.

Moderately concentrated (around 40%): Extremely hot, feeling like drinking scalding porridge, followed by a mix of sweetness and pain that lasts for 2 days before subsiding (didn't dare to drink 98% pure concentrated sulfuric acid).

HNO3 (Nitric Acid)

Dilute: Initially bitter, then the entire tongue goes numb, followed by pain and white spots forming, with continuous pain that subsides after 3-4 days. It also feels like inhaling a large breath of car exhaust.

Concentrated: Too scared to drink (guessing it would be an enhanced version of concentrated sulfuric acid).

**Note:** This is purely a translation task, and under no circumstances should anyone attempt to consume or ingest any of these chemicals as they are highly dangerous and can cause severe harm or death. Always handle acids and other chemicals with extreme caution and follow safety protocols.