system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: since carbon dioxide is tasteless, why does carbonated water still have an identifiable “taste” many days after it’s been opened, when the bubbles have long since disappeared?
gpt
Chemical reactions rarely consume all of the reagents in them. Even after the bubbles stop, there's still a bit of carbonic acid left in the drink, which is what makes carbonated water taste different from regular water.