Why does putting salt on a slug kill it?
> I'm comfortable with the idea of diffusion (by which I understand that, due to the continued random movement of particles, a given substance will spread out in a fluid until there is no concentration gradient in the container). This is the key to understanding osmosis, along with the idea th…
The Short Answer
> I'm comfortable with the idea of diffusion (by which I understand that, due to the continued random movement of particles, a given substance will spread out in a fluid until there is no concentration gradient in the container). This is the key to understanding osmosis, along with the idea that **water is no exception to this rule**. The salt ions will try to move from one side of the slug's skin to the other until they're evenly distributed … but they can't, because the slug's skin doesn't allow salt to cross. But the skin doesn't block the movement of water molecules, and they behave just like the salt: they move from one side of the slug's skin to the other until they're equal in concentration. The salty slime on the skin has a *lower concentration* of water than the inside of the slug, so water moves outward to make the concentrations equal.
Analysis
Key Concepts: Skin, water, until
This explanation focuses on skin, water, until and spans 152 words across 6 sentences. At 134% above the average Everyday Life explanation (65 words), this is one of the more thorough answers in this category, reflecting the complexity of the underlying question.
What This Answer Covers
The explanation opens with: “> I'm comfortable with the idea of diffusion (by which I understand that, due to the continued random movement of par” It then elaborates by presenting a contrasting perspective, ultimately building toward a complete picture across 6 connected points.
How This Compares in Everyday Life
Ranked #18 of 500 Everyday Life questions by answer depth (top 4%). This places it in the comprehensive tier — the top quarter of most thoroughly answered questions. Questions at this depth typically involve multi-faceted topics requiring nuanced explanation.
Frequently Asked Questions
Is there a simple explanation for why putting salt on a slug kill it?
> I'm comfortable with the idea of diffusion (by which I understand that, due to the continued random movement of particles, a given substance will spread out in a fluid until there is no concentration gradient in the container). This is the key…
How detailed is this explanation compared to similar Everyday Life questions?
This is one of the most thorough answer at 152 words, ranked #18 of 500 Everyday Life questions by depth. The key concepts covered are skin, water, until.
What approach does this answer take to explain putting salt on a slug kill it?
The explanation uses root cause analysis and contrasting perspectives across 152 words. It is categorized under Everyday Life and addresses the question through 2 analytical lenses.