Acid strength

weak acidstrong acidstrong acidsweak acidsweakstrongweakly acidicstrengthstrongly acidicweaker acid
Acid strength refers to the tendency of an acid, symbolised by the chemical formula HA, to dissociate into a proton, H +, and an anion, A −.wikipedia
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Hydrochloric acid

HClhydrochloricmuriatic acid
Examples of strong acids are hydrochloric acid (HCl), perchloric acid (HClO 4 ), nitric acid (HNO 3 ) and sulfuric acid (H 2 SO 4 ).
It is classified as strongly acidic and can attack the skin over a wide composition range, since the hydrogen chloride completely dissociates in aqueous solution.

Sulfuric acid

sulphuric acidsulfuricH 2 SO 4
Examples of strong acids are hydrochloric acid (HCl), perchloric acid (HClO 4 ), nitric acid (HNO 3 ) and sulfuric acid (H 2 SO 4 ).
Its corrosiveness can be mainly ascribed to its strong acidic nature, and, if at a high concentration, its dehydrating and oxidizing properties.

Acid dissociation constant

p''K'' a pKapK a
The strength of a weak acid is quantified by its acid dissociation constant, pK a value. The usual measure of the strength of an acid is its acid dissociation constant (K a ), which can be determined experimentally by titration methods.
An acid dissociation constant, K a, (also known as acidity constant, or acid-ionization constant) is a quantitative measure of the strength of an acid in solution.

Nitric acid

nitricHNO 3 aqua fortis
Examples of strong acids are hydrochloric acid (HCl), perchloric acid (HClO 4 ), nitric acid (HNO 3 ) and sulfuric acid (H 2 SO 4 ).
Nitric acid is normally considered to be a strong acid at ambient temperatures.

Acetic acid

aceticglacial acetic acidacetate
Acetic acid (CH 3 COOH) is an example of a weak acid. For example, hydrogen chloride is a strong acid in aqueous solution, but is a weak acid when dissolved in glacial acetic acid.
It is classified as a weak acid since it only partially dissociates in solution, but concentrated acetic acid is corrosive and can attack the skin.

Hydrogen chloride

HClanhydrous hydrochloric acidHCl gas
For example, hydrogen chloride is a strong acid in aqueous solution, but is a weak acid when dissolved in glacial acetic acid.
The resulting solution is called hydrochloric acid and is a strong acid.

Leveling effect

differentiating solventsleveling solventssolvent leveling
This results from the very high buffer capacity of solutions with a pH value of 1 or less and is known as the leveling effect.
The strength of a strong acid is limited ("leveled") by the basicity of the solvent.

Hydrobromic acid

HBrhydrobromichydrobromide
Hydrobromic acid is a strong acid formed by dissolving the diatomic molecule hydrogen bromide (HBr) in water.

Phosphoric acid

phosphoricH 3 PO 4 orthophosphoric acid
Phosphoric acid (H 3 PO 4 ) is tribasic.
Phosphoric acid (also known as orthophosphoric acid or phosphoric(V) acid) is a weak acid with the chemical formula H 3 PO 4.

Hydroiodic acid

hydriodic acidHIhydroiodic
Hydroiodic acid is a commonly used chemical reagent and is one of the strong acids that ionize completely in an aqueous solution.

Acid

acidicacidityacids
Acid strength refers to the tendency of an acid, symbolised by the chemical formula HA, to dissociate into a proton, H +, and an anion, A −.
Strong acids and some concentrated weak acids are corrosive, but there are exceptions such as carboranes and boric acid.

PH

pH levelneutralpH value
This results from the very high buffer capacity of solutions with a pH value of 1 or less and is known as the leveling effect. When the acidic medium in question is a dilute aqueous solution, the H 0 is approximately equal to the pH value, which is a negative logarithm of the concentration of aqueous H + in solution.
Strong acids and bases are compounds that, for practical purposes, are completely dissociated in water.

Chloric acid

HClO 3 chloric
It is a strong acid (pK a ≈ −1) and oxidizing agent.

Hydrogen halide

hydrohalic acidhydrohalic acidshydrogen halides
The extent of ionization of the hydrohalic acids decreases in the order HI > HBr > HCl.
With the exception of hydrofluoric acid, the hydrogen halides are strong acids, with acid strength increasing down the group.

Oxyacid

oxoacid2-oxo acid2-oxoacid
Sulfonic acids, such as p-toluenesulfonic acid (tosylic acid) are a class of strong organic oxyacids.

Chemical formula

molecular formulaformulageneral formula
Acid strength refers to the tendency of an acid, symbolised by the chemical formula HA, to dissociate into a proton, H +, and an anion, A −.

Hydron (chemistry)

H + hydronproton
Acid strength refers to the tendency of an acid, symbolised by the chemical formula HA, to dissociate into a proton, H +, and an anion, A −.

Ion

cationanionions
Acid strength refers to the tendency of an acid, symbolised by the chemical formula HA, to dissociate into a proton, H +, and an anion, A −.

Dissociation (chemistry)

dissociationdissociatedissociates
The dissociation of a strong acid in solution is effectively complete, except in its most concentrated solutions.

Perchloric acid

HClO 4 perchloric
Examples of strong acids are hydrochloric acid (HCl), perchloric acid (HClO 4 ), nitric acid (HNO 3 ) and sulfuric acid (H 2 SO 4 ).

Organic chemistry

organicorganic chemistorganic chemical
The strength of a weak organic acid may depend on substituent effects.

Inorganic chemistry

inorganicinorganic chemistinorganic compounds
The strength of an inorganic acid is dependent on the oxidation state for the atom to which the proton may be attached.

Oxidation state

oxidation numberoxidation statesoxidation
The strength of an inorganic acid is dependent on the oxidation state for the atom to which the proton may be attached.

Titration

titranttitratetitrated
The usual measure of the strength of an acid is its acid dissociation constant (K a ), which can be determined experimentally by titration methods.