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Ordinary table salt, NaCl, consists mainly of Sodium (Na+) and chloride (Cl-) ions. Nowadays, a small amount of Iodide (about 0.5 g/100g) is also added after it was discovered in Britain that the lack of Iodine caused diseases. Without knowing the chemical composition of salt, there is no guarantee for the consumers what the salt is made up of, or of the purity of the salt. Other than this, knowing the crystalline structure of any type of salt might be of vital importance in a lot of different genres, such as in lasers, optic lenses, piezo electronics, computers etc. The key to understanding the materials themselves are to be able to break down their existence into their basic building blocks, analyse these, and from these results draw conclusions and predictions that might bring research forward.
The composition of salt are, of course, varying, for each different compound (NaCl is not the same as CaF2, for example), and the composition of the same type of salts are also known to locally carry some defects (mainly induced by displacement reactions, where an ion jumps from one position to another, leaving the normal type structure and thus also breaking the stoichiometry). This baffeled scientists at first, because the stoichiometry of a reaction had previously been considered absolute, meaning no consideration had been taken to deal with these "defects" noticed in the crystal salts:
x A + y B → AxBy (normal structure, e.g. Rock-salt)
NOT
x A + y B → A(x+0.05)B0.95y (still rock-salt, but because of the defects, some ions of y have been misplaced from the unit cell, while there is a small excess of A ions).
Anyhow, as previously stated, knowing the chemical composition of salts is key to determining what possible applications and implementations might come out of studying it in the future simply because we usually won't know much before we have conducted an experiment or simulation at least.
What else can I help you with?
What is chemical formulars?
Common salt (Sodium Chloride) has the formula NaCl.
Is dissolving of salt physical change or a chemical change?
The dissolving of salt in water is a physical change because it does not result in a chemical reaction. The salt molecules are simply breaking apart and becoming dispersed in the water, but there is no change in the chemical composition of the salt.
Is the melting of table salt physical or chemical?
The melting point is a physical property of materials.
Salt dissovling in water--physical or chemical?
The process of salt dissolving in water is a physical change because it does not involve a change in the chemical composition of either the salt or the water. The salt molecules are simply separated and dispersed within the water molecules.
Why is the melting point of table salt a physical property?
During melting the chemical composition of NaCl is not changed.
Four letter word for salt?
salt=NaCl, its chemical composition
Is mixing salt and water chemical?
Mixing salt and water is a physical change, not a chemical change. The salt does not change its chemical composition when it dissolves in water, only its physical state.
Does salt have definite chemical composition?
Yes. Pure table salt is Sodium chloride ( NaCl ) .
What is chemical formulars?
Common salt (Sodium Chloride) has the formula NaCl.
Is possolving table salt in a glass of water a physical change of a chemical change?
It is a physical change because the chemical composition of the salt and water does not change.
Can you make aquarium salt from regular salt?
No - aquarium salt has a different chemical composition to that of common table salt.
When dissolved in water what will not happen to a salt crystal?
The chemical composition remain unchanged.
What makes salts different?
Each salt has a different chemical composition and consequently different chemical and physical properties.
Is dissolving of salt physical change or a chemical change?
The dissolving of salt in water is a physical change because it does not result in a chemical reaction. The salt molecules are simply breaking apart and becoming dispersed in the water, but there is no change in the chemical composition of the salt.
Is the melting of table salt physical or chemical?
The melting point is a physical property of materials.
Is salt water a mineral?
No. a mineral is a compound of fixed chemical composition and of fixed crystal structure.
What can identify salt?
The chemical composition, the crystalline structure, the taste, the melting and boiling point etc.
