Table salt

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Table salt
Halit-Kristalle.jpg
NaCl polyhedra.png
Sodium-3D.png
Chloride-ion-3D-vdW.png
IUPAC name Sodium chloride
Other names Common salt

Halite
Rock salt
Saline
Sodium chloric
Table salt

Identifiers
CAS number 7647-14-5
PubChem 5234
EC number 231-598-3
KEGG D02056
MeSH Sodium+chloride
ChEBI CHEBI:26710
RTECS number VZ4725000
ATC code A12CA01
SMILES [Na+].[Cl-]
Beilstein Reference 3534976
Gmelin Reference 13673
Properties
Molecular formula NaCl
Molar mass 58.44 g mol−1
Appearance Colorless crystals
Odor Odorless
Density 2.165 g cm−3
Melting point

801 °C, 1074 K, 1474 °F

Boiling point

1413 °C, 1686 K, 2575 °F

Solubility in water 359 g L−1
Solubility in ammonia 21.5 g L−1
Solubility in methanol 14.9 g L−1
Refractive index (nD) 1.5442 (at 589 nm)
Structure
Crystal structure Cubic
(see text), cF8
Space group Fm3m, No. 225
Lattice constant a = 564.02 pm
Coordination
geometry
Octahedral (Na+)
Octahedral (Cl)
Thermochemistry
Std enthalpy of
formation
ΔfHo298
-411.12 kJ mol−1
Standard molar
entropy
So298
72.11 J K−1 mol−1
Specific heat capacity, C 36.79 J K−1 mol−1
Hazards
NFPA 704

NFPA 704.svg

0
1
0
 
Related compounds
Other anions Sodium fluoride
Sodium bromide
Sodium iodide
Other cations Lithium chloride
Potassium chloride
Rubidium chloride
Caesium chloride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Table salt, often called "cooking salt" or just "salt", is widely used in cooking to add flavor to food.

It is a compound of two chemical elements, sodium (symbol: Na) and chlorine (Cl). This is why it has the chemical name "sodium chloride" (symbol: NaCl).

In history, salt was very expensive. Salt was used to keep food from going bad. It was even used as money in some places.[1]

Crystals of sodium chloride are almost perfect cubes.

Atoms (as ions) in a crystal of sodium chloride. The blue ions are sodium and the green ions are chloride.
A magnified crystal of salt

When salt ( sodium chloride) is mixed with water, the salt dissolves into the water creating the Saline Solution.

Salt can be made by either evaporation or can be mined. To get sea salt, man-made holes are built then filled with sea water. The water evaporates and leaves behind salt.

References[change | change source]