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VOOZH | about |
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VOOZH | about |
Hydroxide Ion is a diatomic anion whose chemical formula is OH−. This negatively charged ion is made up of a hydrogen and an oxygen atom which are bonded together by a covalent bond. Hydroxide is also known as a hydroxide radical. This is a diatomic compound with valency -1.
In this article, we will have a complete explanation of Hydroxide ions, and will also learn about their formation, structure, properties, uses, and more.
Table of Content
Hydroxide Ion- Overview | |
|---|---|
Chemical Formula | OH- |
Molecular Weight | 17.003 g/mol |
Valency |
-1 |
pH Range | Alkaline |
Conjugate Acid | water |
Conjugate Base | Oxide anion |
Hydroxide Ion is a negatively charged molecule made up of a single hydrogen atom joined to one oxygen atom. The chemical formula of Hydroxide is OH−. It is formed due to a covalent bond between one oxygen atom and one hydrogen atom.
When a water molecule loses a hydrogen ion (H⁺), it can produce the conjugate base of water (H2O). Hydroxide ions frequently participate in basic or alkaline reactions in aqueous solutions. A hydroxide ion and a hydrogen ion (proton) combine to make water:
OH- + H+ → H2O
Hydroxide + Hydrogen → Water
This process shows how a base (OH⁻) neutralizes an acid (H⁺). Strong bases like potassium hydroxide (KOH) and sodium hydroxide (NaOH) are examples of alkaline compounds that frequently include hydroxide ions.
In water, these materials separate to release hydroxide ions, increasing the pH of the solution. The amount of hydroxide ions present in a solution plays a major role in determining its pH. Bases are substances that enhance the concentration of hydroxide ions; alkaline or basic solutions have larger concentrations of hydroxide ions.
Water (H2O) can autoionize (partially split) into hydroxide ions (OH−) and hydronium ions (H3O+) in aqueous solutions. This process occurs in a tiny percentage of water molecules. The equation representing this equilibrium is given below:
The chemical formula for hydrogen is OH⁻, making it a diatomic ion. It is made up of one hydrogen atom (H) and one oxygen atom (O) bound together covalently. The superscript -1 indicates that the oxygen atom is negatively charged, although the hydrogen atom is still positively charged. This particular combination of elements creates a diatomic ion, which is frequently present in a wide range of chemical compounds.
The following diagram illustrates the hydroxide ion's molecular and Lewis structure:
The ion in this picture has an overall charge of -1 due to the existence of an additional electron, as indicated by the negative charge on oxygen and the line joining H and O, which symbolizes a single covalent link.
One oxygen atom along with one hydrogen atom combines to make hydroxide which is represented by the symbol OH-.
In chemistry, the hydroxide ion is very important, especially in acid-base processes. Few examples of commonly used hydroxide ions are given below:
Caustic soda, also referred to as sodium hydroxide (NaOH), is a potent base that is employed in many different industries. Its uses in everything from soap making to chemical manufacturing demonstrate how important it is to a variety of processes.
Slaked lime, also known as calcium hydroxide (Ca(OH)3), is used in water treatment, agriculture, and building. It is a valuable compound because of its unique qualities, which include its capacity to neutralize acids.
The antacid properties of magnesium hydroxide (Mg(OH)2) are well recognized. In medicine, it neutralizes excess stomach acid to relieve heartburn and indigestion.
KOH, or potassium hydroxide, is a compound that finds use in various chemical and manufacturing processes. Its function in numerous industrial applications is facilitated by its alkaline nature.
A chemical substance that contains the hydroxyl ion (OH-) is referred to as an oxide. A base reacting with water or another acid usually forms hydroxides. As a negatively charged species, the hydroxyl ion forms hydroxide compounds when it combines with positively charged metals or other cations.
Here are two typical processes by which hydroxides might form:
Metal hydroxides are created when metals react with water, particularly alkali and alkaline earth metals. For instance:
Metal (M) + Water (H2O) → Metal Hydroxide (M(OH)2) + Hydrogen (H2O )
Depending on which metal is involved in the process, a certain hydroxide will produced.
Substances known as bases have the ability to contribute electron pairs or take protons (H+). A base and water can react to produce hydroxide ions:
Base + Water → Hydroxide Ion + Conjugate Acid
To form hydroxide ions, for instance, ammonia (NH3) can combine with water.
NH3 + H2O → NH4+ + OH-
Hydroxide are broadly classified in two types namely:
Compounds containing the hydroxyl group (-OH) joined to a carbon atom in an organic molecule are known as organic hydroxides. Organic hydroxides, which have a hydroxyl group covalently bound to a carbon atom, are frequently found in organic molecules such as carboxylic acids, phenols, and alcohols.
Methanol (CH3OH), Phenol (C6H5OH) are few examples of organic hydroxide.
Compounds that do not belong to an organic molecule but yet include the hydroxide ion (OH⁻) are known as inorganic hydroxides. When a metal combines with water or an acid, it usually forms metal hydroxides. Because they are bases, inorganic hydroxides frequently dissociate in water to produce hydroxide ions.
Inorganic hydroxides include, sodium hydroxide (NaOH), Calcium Hydroxide (Ca(OH)2), etc.
Also Check, Iron 3 Hydroxide
Few of the important properties of hydroxide ion is described below:
Hydroxide has Chemical Formula OH⁻.
Hydroxide has a valency of -1. This indicates that the charge of hydroxide ions is -1.
Concentration of hydroxide ions determines the pH of hydroxide solutions. A solution that contains a lot of hydroxide ions will often be alkaline, meaning that its pH is greater than 7.
Hydroxides, in their organic and inorganic forms, display a variety of physical and chemical characteristics. In this section, we will examine the physical and chemical properties of hydroxides.
Some of the physical properties of the Hydroxide Ion are,
Some of the chemical properties of hydroxide ions are,
There are several uses for hydroxide-containing chemicals and hydroxide ions (OH⁻) in both daily life and diverse industries. Among the noteworthy applications are:
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