What is the freezing point of 0.9 percent normal saline?

Answer 1

The freezing point of a solution is lowered compared to that of pure water due to the presence of solutes. For a 0.9% normal saline solution, the freezing point depression can be calculated using the formula ΔTf = i * Kf * m, where i is the van't Hoff factor (which is 2 for NaCl), Kf is the cryoscopic constant for water (1.86 °C kg/mol), and m is the molality of the solution (0.9 mol/kg). Plugging in these values, we find that the freezing point of 0.9% normal saline is approximately -0.99°C.

Answer 2

The melting point of water is lowered by 1.85 degrees Celsius if 29.2 grams of salt are dissolved in each Kg of water (called a "0.5 molal solution" of salt). So normal saline, a 0.9 molal solution), is lowered juts less thantwice this or 3.33 deg C.

So normal saline freezes at -3.33 deg C or 26 deg F.

Answer 3

The freezing point of 0.9% normal saline (the standard saline solution) is about -0.52°C (31.1°F). This is slightly below the freezing point of water.

Answer 4

The freezing point of a 0.9% normal saline solution is approximately -0.52 degrees Celsius. This solution is commonly used for medical purposes and is isotonic with human blood.