system
Given the following post, respond as if you're commenting on Reddit:
human
How does drano unclog drains?
gpt
The major ingredients of Drano are sodium hydroxide (NaOH) and, in many cases, aluminum flakes (Al). When dissolved in water, the NaOH reacts with Al to form hydrogen gas bubbles, which help dislodge clogs. The NaOH solution is also strongly caustic (highly alkaline), which helps chemically degrade proteins (into smaller molecular fragments) and fats / oils (into water-soluble components). The combination of physical force (bubbles) and chemical reactivity (reactions with proteins and fats / oils) together help get rid of whatever is clogging the drain.