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| Salt Reactions and Its Combinations |
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Salt Reactions is the substance produced by the reaction of an acid with a base. A salt consists of the positive ion of a base and negative ion of an acid. The reaction between the acid and a base is called the neutralization reaction. The salt is also known as table salt or sodium chloride. When it is in molten state, most of the salts are completely dissociated into positive and negatively charged ions. These salt reactions act as good conductors of electricity.
Depending on the solubility of the salt reactions it may become in ionized form and neutralization reactions usually proceed to completion. The reverse of the neutralization reaction is the hydrolysis in which the salt reacts with water to form acid or base solutions. The four combinations of strong and weak acids or based of salt reactions are,
- strong acid + strong base,
- strong acid + weak base
- weak acid + strong base, and
- weak acid + weak base.
The salt reactions are also known as acid-base reaction which is a chemical reaction that takes place between the acid and base. The various acid-base theories are Lavoisier, Liebig, Lewis and Solvent-System. The water reaction takes place with normal salts and provides a medium through which the reacting substance may come together. In the acid-base reactions the H3O+ and OH- ions are formed directly from the acids and bases through the process ionization. So, the salt reactions are produced by acid-base neutralization.
The salt reactions that are formed from the strong base and weak acid will form a water solution and it is not neutral. The sodium chloride and water are formed by the neutralization of sodium hydroxide and along with hydrogen chloride and acid. Most of the salts are ionic compounds which are made up of ions rather than molecules. In the reaction of sodium with chloride the sodium loses the electron and becomes positively charged. But, the chlorine atoms gain electron and becomes negatively charged in which there will be the equal number of positively charged sodium ions and negatively charged chloride ions. So, the ions in the salt reactions are arranged in the crystalline structure.
These salt reactions are formed when the hydrogen of an acid is replaced by the metal or by ammonium. Typically acid and base reacts to form water and salt in which the most inorganic salts get ionized in the water solution. The various forms of salts are sodium bicarbonate, silver nitrate and calcium carbonate. These salt reactions are grouped according to the negative ion.
The salt reactions are also prepared by other methods than neutralization. Another method is one in which the metal can combine directly with the nonmetal of form the salt. For example, the sodium metal reacts with chlorine gas to form the sodium chloride. A metal can also react with the dilute acid to form a salt and release the hydrogen gas. The base can react with the nonmetallic acid to form water and salt. For example, sodium hydroxide reacts with carbon dioxide to form sodium carbonate and water. Finally, the salt reactions undergo dissociation when it dissolves in the polar solvent.
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