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DISSOCIATION CONSTANT ACID [7 records]
Record 1 - internal organization data 2016-12-21
Record 1, English
Record 1, Subject field(s)
- Metrology and Units of Measure
- Electrolysis (Electrokinetics)
- Electrochemistry
Record 1, Main entry term, English
- pK
1, record 1, English, pK
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- ionisation behavior 2, record 1, English, ionisation%20behavior
correct, less frequent
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
A measurement of the completeness of an incomplete chemical reaction. It is defined as the negative logarithm(to the base 10) of the equilibrium constant, K, for the reaction in question. The pK is most frequently used to express the extent of dissociation or the strength of weak acids... In a solution of weak acid, if the concentration of undissociated acid is equal to the concentration of the anion of the acid, the pK will be equal to the pH. 1, record 1, English, - pK
Record number: 1, Textual support number: 1 OBS
ionisation behavior: term extracted from the “Glossaire de l’environnement” and reproduced with permission of the Organisation for Economic Co-operation and Development. 3, record 1, English, - pK
Record 1, Key term(s)
- ionisation behaviour
Record 1, French
Record 1, Domaine(s)
- Unités de mesure et métrologie
- Électrolyse (Électrocinétique)
- Électrochimie
Record 1, Main entry term, French
- pK
1, record 1, French, pK
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- comportement d'ionisation 2, record 1, French, comportement%20d%27ionisation
masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Expression signifiant -log K avec K = A x B sur AB expression de la loi d'action de masses pour la dissociation d'une molécule AB. Si le corps (acide sulfurique) subit deux dissociations successives, on trouvera des expressions notées pK1 et pK2. 1, record 1, French, - pK
Record number: 1, Textual support number: 1 OBS
On dit "pK", tout comme on dit "pH"; contrairement au pH, cependant, qui est le symbole du potentiel hydrogène, le symbole "pK" ne renvoit à aucun terme de référence. 3, record 1, French, - pK
Record number: 1, Textual support number: 2 OBS
comportement d'ionisation : terme extrait du «Glossaire de l’environnement» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques. 4, record 1, French, - pK
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2012-02-15
Record 2, English
Record 2, Subject field(s)
- Electrolysis (Electrokinetics)
- Electrochemistry
- Chemistry
Record 2, Main entry term, English
- acidity constant
1, record 2, English, acidity%20constant
correct
Record 2, Abbreviations, English
- Ka 2, record 2, English, Ka
correct, see observation
Record 2, Synonyms, English
- dissociation constant of an acid 3, record 2, English, dissociation%20constant%20of%20an%20acid
correct
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
The equilibrium constant Kan for splitting off the nth proton from a charged or uncharged acid, to be defined. 4, record 2, English, - acidity%20constant
Record number: 2, Textual support number: 1 CONT
If an acid A is added to the solvent SH it will be at least partly converted into the conjugate base B... Ka is known as the dissociation constant of the acid A in the solvent SH.... Similar considerations apply to solutions of bases... the equilibrium constant Kb is termed the dissociation constant of the base B.... 5, record 2, English, - acidity%20constant
Record number: 2, Textual support number: 1 OBS
Ka: the letter "a" in this symbol is a subscript. 6, record 2, English, - acidity%20constant
Record 2, French
Record 2, Domaine(s)
- Électrolyse (Électrocinétique)
- Électrochimie
- Chimie
Record 2, Main entry term, French
- constante d'acidité
1, record 2, French, constante%20d%27acidit%C3%A9
correct, feminine noun
Record 2, Abbreviations, French
- Ka 2, record 2, French, Ka
correct, see observation
Record 2, Synonyms, French
- constante de dissociation acide 3, record 2, French, constante%20de%20dissociation%20acide
correct, feminine noun
- constante de dissociation d'un acide 3, record 2, French, constante%20de%20dissociation%20d%27un%20acide
correct, feminine noun
- constante d'un acide 3, record 2, French, constante%20d%27un%20acide
correct, feminine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
La constante d'équilibre, Kan, représente la constante d'équilibre correspondant à la dissociation du n [ème] proton, à partir d'un acide électriquement chargé ou neutre à définir. 4, record 2, French, - constante%20d%27acidit%C3%A9
Record number: 2, Textual support number: 1 CONT
Relation entre constantes de dissociation acide et basique. [...] Il doit exister une relation entre Ka etb si l'acide et la base concernés appartiennent au même couple acido-basique [...] 3, record 2, French, - constante%20d%27acidit%C3%A9
Record number: 2, Textual support number: 1 OBS
Cette notion complexe donne lieu à plusieurs expressions qui sont des quasi-synonymes selon l'aspect qu'on fait ressortir. Un produit chimique se dissocie (dissociation) en ions positifs et négatifs (ionisation) jusqu'à ce qu'il atteigne un certain équilibre (stabilité), variable selon chaque produit. La concentration des ions positifs multipliée par celle des ions négatifs donne le produit ionique, une constante qui permet d'évaluer quantitativement cet équilibre. La constante permet donc d'évaluer l'acidité d'un produit et, par déduction, sa basicité. 5, record 2, French, - constante%20d%27acidit%C3%A9
Record number: 2, Textual support number: 2 OBS
Ka : la lettre «a» de ce symbole s'écrit en indice. 6, record 2, French, - constante%20d%27acidit%C3%A9
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2010-06-08
Record 3, English
Record 3, Subject field(s)
- Analytical Chemistry
- Electrolysis (Electrokinetics)
- Electrochemistry
Record 3, Main entry term, English
- dissociation constant of a base
1, record 3, English, dissociation%20constant%20of%20a%20base
correct
Record 3, Abbreviations, English
- Kb 1, record 3, English, Kb
correct, see observation
Record 3, Synonyms, English
- basic dissociation constant 1, record 3, English, basic%20dissociation%20constant
correct
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
If an acid A is added to the solvent SH it will be at least partly converted into the conjugate base B... K is known as the dissociation constant of the acid A in the solvent SH.... Similar considerations apply to solutions of bases... the equilibrium constant Kb is termed the dissociation constant of the base B.... 1, record 3, English, - dissociation%20constant%20of%20a%20base
Record number: 3, Textual support number: 1 OBS
Kb 2, record 3, English, - dissociation%20constant%20of%20a%20base
Record 3, French
Record 3, Domaine(s)
- Chimie analytique
- Électrolyse (Électrocinétique)
- Électrochimie
Record 3, Main entry term, French
- constante de dissociation basique
1, record 3, French, constante%20de%20dissociation%20basique
correct, feminine noun
Record 3, Abbreviations, French
- Kb 1, record 3, French, Kb
correct, see observation, feminine noun
Record 3, Synonyms, French
- constante de basicité 1, record 3, French, constante%20de%20basicit%C3%A9
correct, feminine noun
- constante de dissociation d'une base 2, record 3, French, constante%20de%20dissociation%20d%27une%20base
correct, feminine noun
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
Relation entre constantes de dissociation acide et basique. [...] Il doit exister une relation entre Ka et Kb si l'acide et la base concernés appartiennent au même couple acido-basique [...] 1, record 3, French, - constante%20de%20dissociation%20basique
Record number: 3, Textual support number: 1 OBS
Cette notion complexe donne lieu à plusieurs expressions qui sont des quasi-synonymes selon l'aspect qu'on fait ressortir. Un produit chimique se dissocie (dissociation) en ions positifs et négatifs (ionisation) jusqu'à ce qu'il atteigne un certain équilibre (stabilité), variable selon chaque produit. La concentration des ions positifs multipliée par celle des ions négatifs donne le produit ionique, une constante qui permet d'évaluer quantitativement cet équilibre. La constante permet donc d'évaluer l'acidité d'un produit et, par déduction, sa basicité. 3, record 3, French, - constante%20de%20dissociation%20basique
Record number: 3, Textual support number: 2 OBS
Kb 4, record 3, French, - constante%20de%20dissociation%20basique
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 2003-11-25
Record 4, English
Record 4, Subject field(s)
- Chemistry
- Electrolysis (Electrokinetics)
- Electrochemistry
- Air Pollution
Record 4, Main entry term, English
- strong acid
1, record 4, English, strong%20acid
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
An acid with a high degree of dissociation in solution, for example, mineral acids, such as hydrochloric acid, HC1, sulfuric acid, H2SO4, or nitric acid, HNO3. 2, record 4, English, - strong%20acid
Record number: 4, Textual support number: 1 CONT
The ionisation of an acid in water can be written as HA=H+-A-. Qualitatively, an acid is strong if this reaction goes extensively toward the ionic products and weak if the ionisation is only slight.... [The] dissociation constant is a large number for a strong acid and a small number for a weak acid. 3, record 4, English, - strong%20acid
Record 4, French
Record 4, Domaine(s)
- Chimie
- Électrolyse (Électrocinétique)
- Électrochimie
- Pollution de l'air
Record 4, Main entry term, French
- acide fort
1, record 4, French, acide%20fort
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 DEF
Acide complètement dissocié en ions [...] 2, record 4, French, - acide%20fort
Record number: 4, Textual support number: 1 CONT
Qualitativement, un acide est d'autant plus fort que cette réaction [ionisation] se déplace vers les ions, et, inversement, d'autant plus faible que l'ionisation est plus petite. Quantitativement [...], à 25°C dans l'eau, la valeur Ka est de 1,754 x 10-5 pour l'acide acétique (acide faible), tandis qu'elle est de 1,6 x 10-1 pour l'acide picrique (acide assez fort). 3, record 4, French, - acide%20fort
Record 4, Spanish
Record 4, Campo(s) temático(s)
- Química
- Electrólisis (Electrocinética)
- Electroquímica
- Contaminación del aire
Record 4, Main entry term, Spanish
- ácido fuerte
1, record 4, Spanish, %C3%A1cido%20fuerte
correct, masculine noun
Record 4, Abbreviations, Spanish
Record 4, Synonyms, Spanish
Record 4, Textual support, Spanish
Record number: 4, Textual support number: 1 DEF
Acido que presenta un elevado grado de disociación cuando se encuentra en disolución. 1, record 4, Spanish, - %C3%A1cido%20fuerte
Record 5 - internal organization data 2000-10-16
Record 5, English
Record 5, Subject field(s)
- Chemistry
- Electrolysis (Electrokinetics)
- Electrochemistry
Record 5, Main entry term, English
- weak acid
1, record 5, English, weak%20acid
correct
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 DEF
An acid that does not ionize greatly; for example, acetic acid or carbonic acid. 2, record 5, English, - weak%20acid
Record number: 5, Textual support number: 1 CONT
The ionisation of an acid in water can be written as HA=H+-A-. Qualitatively, an acid is strong if this reaction goes extensively toward the ionic products and weak if the ionisation is only slight.... [The] dissociation constant is a large number for a strong acid and a small number for a weak acid. 3, record 5, English, - weak%20acid
Record 5, French
Record 5, Domaine(s)
- Chimie
- Électrolyse (Électrocinétique)
- Électrochimie
Record 5, Main entry term, French
- acide faible
1, record 5, French, acide%20faible
correct, masculine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record number: 5, Textual support number: 1 DEF
Acide peu dissocié. 2, record 5, French, - acide%20faible
Record number: 5, Textual support number: 1 CONT
Qualitativement, un acide est d'autant plus fort que cette réaction [ionisation] se déplace vers les ions, et inversement, d'autant plus faible que l'ionisation est plus petite. Quantitativement [...], à 25°C dans l'eau, la valeur Ka est de 1,754 x 10-5 pour l'acide acétique (acide faible), tandis qu'elle est de 1,6 x 10-1 pour l'acide picrique (acide assez fort). 1, record 5, French, - acide%20faible
Record 5, Spanish
Record 5, Campo(s) temático(s)
- Química
- Electrólisis (Electrocinética)
- Electroquímica
Record 5, Main entry term, Spanish
- ácido débil
1, record 5, Spanish, %C3%A1cido%20d%C3%A9bil
correct, masculine noun
Record 5, Abbreviations, Spanish
Record 5, Synonyms, Spanish
Record 5, Textual support, Spanish
Record 6 - internal organization data 1982-08-15
Record 6, English
Record 6, Subject field(s)
- Electrolysis (Electrokinetics)
- Electrochemistry
- Chemistry
Record 6, Main entry term, English
- dissociation equilibrium
1, record 6, English, dissociation%20equilibrium
correct
Record 6, Abbreviations, English
Record 6, Synonyms, English
- ionic equilibrium 2, record 6, English, ionic%20equilibrium
correct
Record 6, Textual support, English
Record number: 6, Textual support number: 1 CONT
The classical method for determining the dissociation constant of an acid or a base is to measure the electrical conductivity of solutions of varying concentrations... It is... unsuitable for acids of pK [smaller than] 7, because impurities in the solvent may affect the conductivity or displace the dissociation equilibrium. 1, record 6, English, - dissociation%20equilibrium
Record 6, French
Record 6, Domaine(s)
- Électrolyse (Électrocinétique)
- Électrochimie
- Chimie
Record 6, Main entry term, French
- équilibre de dissociation
1, record 6, French, %C3%A9quilibre%20de%20dissociation
correct, masculine noun
Record 6, Abbreviations, French
Record 6, Synonyms, French
- équilibre d'ionisation 1, record 6, French, %C3%A9quilibre%20d%27ionisation
correct, masculine noun
Record 6, Textual support, French
Record number: 6, Textual support number: 1 CONT
Un acide HA est une substance qui, en solution aqueuse, fournit, lors de son équilibre de dissociation, des protons H (...); une base BOH est une substance qui, dans les mêmes conditions, fournit des ions OH- (...). A ces équilibres correspondent des constantes (...) 1, record 6, French, - %C3%A9quilibre%20de%20dissociation
Record number: 6, Textual support number: 1 OBS
Cette notion complexe donne lieu à plusieurs expressions qui sont des quasi-synonymes selon l'aspect qu'on fait ressortir. Un produit chimique se dissocie (association) en ions positifs et négatifs (ionisation) jusqu'à ce qu'il atteigne un certain équilibre (stabilité), variable selon chaque produit. La concentration des ions positifs multipliée par celle des ions négatifs donne le produit ionique, une constante qui permet d'évaluer quantitativement cet équilibre. La constante permet donc d'évaluer l'acidité d'un produit et, par déduction, sa basicité. 2, record 6, French, - %C3%A9quilibre%20de%20dissociation
Record 6, Spanish
Record 6, Textual support, Spanish
Record 7 - internal organization data 1982-08-10
Record 7, English
Record 7, Subject field(s)
- Electrolysis (Electrokinetics)
- Electrochemistry
- Chemistry
Record 7, Main entry term, English
- weak base
1, record 7, English, weak%20base
correct
Record 7, Abbreviations, English
Record 7, Synonyms, English
Record 7, Textual support, English
Record number: 7, Textual support number: 1 CONT
The dissociation constant is... a measure of acid strength... A is said then to be a strong acid in the solvent SH; similarly, acids with readily measurable dissociation constants... are known as weak acids. Similar considerations apply to solutions of bases.... Bases are termed strong and weak in the same way that acids are. 1, record 7, English, - weak%20base
Record 7, French
Record 7, Domaine(s)
- Électrolyse (Électrocinétique)
- Électrochimie
- Chimie
Record 7, Main entry term, French
- base faible
1, record 7, French, base%20faible
correct, feminine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
Record 7, Textual support, French
Record number: 7, Textual support number: 1 CONT
La théorie des ions d'Arrhenius attribue les propriétés des bases en solution aqueuse aux ions hydroxyles OH- qu'elles émettent par dissociation ionique : la base est forte, comme NaOH, si cette dissociation est totale, faible si elle n'est que partielle. 1, record 7, French, - base%20faible
Record number: 7, Textual support number: 2 CONT
Un acide (ou une base) dont une partie des molécules se dissocient en ions dans l'eau est dit acide faible (ou base faible). 2, record 7, French, - base%20faible
Record 7, Spanish
Record 7, Textual support, Spanish
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