Salt (sodium chloride, NaCl) has a well-documented solubility of about 35.7 grams per 100 grams of water at 0 degrees Celsius. This means that at this temperature, you can dissolve up to 35.7 grams of salt in 100 grams of water before the solution becomes saturated. Below this threshold, any additional salt will not dissolve and will simply settle at the bottom.
It’s also important to note that the solubility of NaCl does not vary significantly with changes in temperature. This characteristic makes it effective as an electrolyte, particularly in applications like melting ice on roads. By lowering the melting point of ice through a process known as freezing point depression, NaCl helps keep pathways and driveways clear in winter.
In summary, while NaCl can dissolve at low temperatures, the 0 degrees Celsius mark represents a crucial point—where it can dissolve its maximum amount in water. However, even in conditions just under freezing, some dissolution can occur, but it would be minimal compared to warmer temperatures. Therefore, understanding salt’s solubility is essential for utilizing it effectively in varying weather conditions.