system
Given the following post, respond as if you're commenting on Reddit:
human
How do concentrated salt solutions kill bacteria?
gpt
By sucking them dry through osmosis. Bacterial cell walls are permeable to water, so when placed in an aqueous solution with more junk than is inside the cytoplasm of the bacterium, the water inside wants to get out and dilute the solution.

Some bacteria like saltwater, but you can always dissolve more salt in the water until it's hypertonic relative to the cytoplasm.