The properties of salt help us understand its beneficial uses.

salt_molecule

The formula for salt, sodium chloride, is 60.663% elemental chlorine (Cl) and 39.337% sodium (Na). Chlorine’s atomic weight is 35.4527; for sodium, 22.989768.

 

Chemical Properties of Pure Sodium Chloride

Property Value
Molecular weight NaCl 58.4428
Atomic weight – Na 22.989768 (39.337%)
Atomic weight – Cl 35.4527 (60.663%)
Specific gravity 2.1 – 2.6
Eutectic composition 23.31% NaCl
Freezing point of eutectic mixture 21.12° C (-6.016°F)
pH of aqueous solution neutral

Solubility of Salt at Various Temperatures

Temperature °F Temperature °C % Salt
-6 -21.11 23.31*
0 -17.78 23.83
10 -12.22 24.7
20 -6.67 25.53
30 -1.1 26.16
32 0 26.29
32.2 0.1 26.31**
40 4.44 26.33
50 10 26.36
60 15.56 26.395
70 21.11 26.45
80 26.67 26.52
100 37.78 26.68
125 51.67 26.92
150 65.56 27.21
175 79.44 27.62
200 93.33 27.91
212 100 28.12
220 104.44 28.29
227.5 108.7 28.46***

* Eutectic point
** Transition point
*** Boiling point at one atmosphere pressure