As we know that the normal freezing temperature of the water is 0 degree Celsius and in the Fahrenheit, it is 32 degrees Fahrenheit. This is the point where the water or any liquid solution starts freezing and turns into the solid form of ice.
This is the freezing temperature of the normal water and when we talk about the freezing point of the salt solution means water, which has been mixed with the salt, then the freezing temperature point of the water gets lower. The freezing point of the salt water solution is – 6 degrees which are -21.1 degree Celsius on the Celsius scale.
So, this is exactly the temperature level when the salt solution of the water starts freezing just like the normal plain water. In this whole process, there will come a point when the salt will be behind the water.