Saturated Saltwater

Most recent answer: 05/24/2016

According to an answer on your website about how saturated saltwater can get, it's 23.3% salt by weight. When we visited salt mines in Austria, the guide told us that the briny water in the salt mines was 27% salt. Is that possible?
- Zach (age 11)
La Mesa, CA

I think this is the question to which you're referring:

That 23.3% by weight is the saturation concentration at the lowest temperature (about -21°C) for which the pure liquid is stable. At lower temperatures some ice forms. At room temperature the saturation concentration is about 27%, just as your guide said.

Mike W.

(published on 05/24/2016)