Ostwald dilution law
E1025756
The Ostwald dilution law is a principle in physical chemistry that relates the dissociation constant of a weak electrolyte to its degree of dissociation and concentration in solution.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Ostwald dilution law canonical | 3 |
| Ostwald’s law of dilution | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13200172 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Ostwald dilution law Context triple: [Wilhelm Ostwald, notableWork, Ostwald dilution law]
-
A.
Arrhenius equation
The Arrhenius equation is a fundamental formula in physical chemistry that relates the rate of a chemical reaction to temperature through an exponential dependence on activation energy.
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B.
Arrhenius acid–base theory
Arrhenius acid–base theory is a classical chemical concept that defines acids as substances that increase hydrogen ion concentration and bases as substances that increase hydroxide ion concentration in aqueous solution.
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C.
Hammett equation
The Hammett equation is a fundamental linear free-energy relationship in physical organic chemistry that quantitatively correlates reaction rates and equilibria with the electronic effects of substituents on aromatic compounds.
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D.
Debye–Hückel theory
Debye–Hückel theory is a foundational model in physical chemistry that explains how electrostatic interactions between ions in solution affect properties such as activity coefficients and equilibrium behavior in electrolytes.
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E.
Arrhenius
Arrhenius is a Swedish surname most famously associated with Svante Arrhenius, a pioneering chemist and one of the founders of physical chemistry.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Ostwald dilution law Target entity description: The Ostwald dilution law is a principle in physical chemistry that relates the dissociation constant of a weak electrolyte to its degree of dissociation and concentration in solution.
-
A.
Arrhenius equation
The Arrhenius equation is a fundamental formula in physical chemistry that relates the rate of a chemical reaction to temperature through an exponential dependence on activation energy.
-
B.
Arrhenius acid–base theory
Arrhenius acid–base theory is a classical chemical concept that defines acids as substances that increase hydrogen ion concentration and bases as substances that increase hydroxide ion concentration in aqueous solution.
-
C.
Hammett equation
The Hammett equation is a fundamental linear free-energy relationship in physical organic chemistry that quantitatively correlates reaction rates and equilibria with the electronic effects of substituents on aromatic compounds.
-
D.
Debye–Hückel theory
Debye–Hückel theory is a foundational model in physical chemistry that explains how electrostatic interactions between ions in solution affect properties such as activity coefficients and equilibrium behavior in electrolytes.
-
E.
Arrhenius
Arrhenius is a Swedish surname most famously associated with Svante Arrhenius, a pioneering chemist and one of the founders of physical chemistry.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
equilibrium law
ⓘ
law in physical chemistry ⓘ |
| alsoKnownAs |
Ostwald’s law of dilution
ⓘ
linked to:
Ostwald dilution law
|
| appliesTo |
weak acids
ⓘ
weak bases ⓘ weak electrolytes ⓘ |
| assumes |
ideal solution behavior
ⓘ
low concentration of electrolyte ⓘ |
| breaksDownAt |
high electrolyte concentration
ⓘ
strong interionic interactions ⓘ |
| category |
chemical equilibrium
ⓘ
electrolyte solutions ⓘ |
| concerns | relationship between conductivity and dissociation ⓘ |
| definesSymbol |
K as dissociation constant
ⓘ
c as analytical concentration of electrolyte ⓘ α as degree of dissociation ⓘ |
| describes | ionic equilibrium of weak electrolytes ⓘ |
| expressedAs | K = c·α² / (1 − α) ⓘ |
| field |
physical chemistry
ⓘ
solution chemistry ⓘ |
| hasApproximateForm | K ≈ c·α² for very weak electrolytes at low α ⓘ |
| hasMathematicalForm | K = [A⁻][H⁺] / [HA] for a weak acid HA ⓘ |
| helpsExplain | difference between strong and weak electrolytes ⓘ |
| historicalPeriod | late 19th century ⓘ |
| implies |
degree of dissociation increases with dilution
ⓘ
weak electrolyte becomes more dissociated at lower concentration ⓘ |
| languageOfOrigin | German ⓘ |
| namedAfter | Wilhelm Ostwald ⓘ |
| relatedTo |
Arrhenius theory of electrolytic dissociation
ⓘ
linked to:
ionic dissociation theory
Debye–Hückel theory ⓘ law of mass action ⓘ |
| relatesQuantity |
concentration of electrolyte
ⓘ
degree of dissociation ⓘ dissociation constant ⓘ |
| usedFor |
calculation of degree of dissociation
ⓘ
calculation of dissociation constant ⓘ estimation of strength of weak acids ⓘ estimation of strength of weak bases ⓘ |
| usedIn |
acid–base titration calculations for weak acids
ⓘ
determination of pKa of weak acids ⓘ determination of pKb of weak bases ⓘ |
| usedWith | molar conductivity measurements ⓘ |
| validWhen |
activity coefficients are approximately 1
ⓘ
α is small ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Ostwald dilution law Description of subject: The Ostwald dilution law is a principle in physical chemistry that relates the dissociation constant of a weak electrolyte to its degree of dissociation and concentration in solution.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Ostwald dilution law