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Chapitre 15

Acides et bases

Acides et bases de Bronsted-Lowry
Acides et bases de Bronsted-Lowry
The acid-base reaction class has been studied for quite some time. In 1680, Robert Boyle reported traits of acid solutions that included their ability to ...
Forces des acides/bases et constantes de dissociation
Forces des acides/bases et constantes de dissociation
The relative strength of an acid or base is the extent to which it ionizes when dissolved in water. If the ionization reaction is essentially complete, ...
L'eau : un acide et une base selon Bronsted-Lowry
L'eau : un acide et une base selon Bronsted-Lowry
The reaction between a Brønsted-Lowry acid and water is called acid ionization. For example, when hydrogen fluoride dissolves in water and ionizes, ...
Échelle de pH
Échelle de pH
Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as ...
Forces relatives des paires acide-base conjuguées
Forces relatives des paires acide-base conjuguées
Brønsted-Lowry acid-base chemistry is the transfer of protons; thus, logic suggests a relation between the relative strengths of conjugate acid-base ...
Acides forts et solutions basiques
Acides forts et solutions basiques
A strong acid is a compound that dissociates completely in an aqueous solution and produces a concentration of hydronium ions equal to the initial ...
Solutions d'acides faibles
Solutions d'acides faibles
Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of ...
Solutions de base faible
Solutions de base faible
Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and ...
Mélanges d'acides
Mélanges d'acides
The pH of a solution containing an acid can be determined using its acid dissociation constant and its initial concentration. If a solution contains two ...
Les ions comme acides et bases
Les ions comme acides et bases
Salts with Acidic Ions Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization ...
Détermination du pH des solutions salines
Détermination du pH des solutions salines
The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations ...
Polyacides
Polyacides
Acids are classified by the number of protons per molecule that they can give up in a reaction. Acids such as HCl, HNO3, and HCN that contain one ...
Force des acides et structure moléculaire
Force des acides et structure moléculaire
Binary Acids and Bases In the absence of any leveling effect, the acid strength of binary compounds of hydrogen with nonmetals (A) increases as the H-A ...
Acides et bases de Lewis
Acides et bases de Lewis
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to ...
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