saltwater freezes at what temperature
seawater freezes at about 28.4 degrees Fahrenheit , because of the salt in it
I agree with bobpursley!!!
Saltwater, also known as seawater, has a lower freezing point than pure water due to the dissolved salts and minerals it contains. The freezing point of saltwater can vary depending on the concentration of salt, but on average, it freezes at approximately -2 degrees Celsius (28.4 degrees Fahrenheit).
To determine the freezing point of saltwater more accurately, you can use the concept of freezing point depression, which states that the presence of solutes (such as salt) lowers the freezing point of a solvent (such as water). The freezing point depression can be calculated using the formula:
ΔT = K × m
Where:
ΔT = Freezing point depression (the difference between the freezing point of the pure solvent and the freezing point of the solution)
K = Cryoscopic constant (a property specific to each solvent)
m = Molality of the solute (moles of solute per kilogram of solvent)
For water, the cryoscopic constant (K) is approximately 1.86 °C·kg/mol. So, if you know the concentration of salt in the seawater, you can calculate the molality (m) and determine the freezing point depression (ΔT). For instance, if you have seawater with a salt concentration of 3% (0.03), you can multiply it by the molality constant:
ΔT = 1.86 °C·kg/mol × 0.03 mol/kg = 0.0558 °C
Therefore, the freezing point of this 3% saltwater would be around -2.0558 °C.
However, it is essential to note that the freezing point of saltwater can still vary due to factors like dissolved impurities, pressure, and other solutes present in seawater.