Bjerrum plot (original) (raw)
Is éard is Breacadh Bjerrum (ainmnithe i ndiaidh Niels Bjerrum ) ná graf de thiúchan na speiceas éagsúil d’aigéad polaprótónaigh i dtuaslagán, mar fheidhm de pH, nuair a bhíonn cothromaíocht baint amach ag an tuaslagán. Mar gheall ar an iliomad ord méadaíochta a chuimsíonn na tiúchain, déantar iad a bhreacadh go coitianta ar scála logartamach . Uaireanta déantar cóimheasa na dtiúchan a bhreacadh seachas na tiúchain iarbhír. Uaireanta déantar H + agus OH - a bhreacadh freisin.
| Property | Value |
|---|---|
| dbo:abstract | A Bjerrum plot (named after Niels Bjerrum; sometimes also known as a Sillén diagram or a Hägg diagram) is a graph of the concentrations of the different species of a polyprotic acid in a solution, as a function of pH, when the solution is at equilibrium. Due to the many orders of magnitude spanned by the concentrations, they are commonly plotted on a logarithmic scale. Sometimes the ratios of the concentrations are plotted rather than the actual concentrations. Occasionally H+ and OH− are also plotted. Most often, the carbonate system is plotted, where the polyprotic acid is carbonic acid (a diprotic acid), and the different species are dissolved carbon dioxide, carbonic acid, bicarbonate, and carbonate. In acidic conditions, the dominant form is CO2; in basic (alkaline) conditions, the dominant form is CO2−3; and in between, the dominant form is HCO−3. At every pH, the concentration of carbonic acid is assumed to be negligible compared to the concentration of dissolved CO2, and so is often omitted from Bjerrum plots. These plots are very helpful in solution chemistry and natural water chemistry. In the example given here, it illustrates the response of seawater pH and carbonate speciation due to the input of man-made CO2 emission by the fossil fuel combustion. The Bjerrum plots for other polyprotic acids, including silicic, boric, sulfuric and phosphoric acids, are other commonly used examples. (en) Das Hägg-Diagramm (engl. Hägg's diagram oder bjerrum plot nach Niels Janniksen Bjerrum), auch Speziierungsdiagramm (vgl. Speziierung) genannt, dient in der analytischen Chemie dazu, sich schnell einen Überblick über die Verhältnisse einer wässrigen Säure-, Base- oder Salzlösung bekannter Konzentration zu geben. Es liefert eine doppelt-logarithmische Darstellung der Konzentrationsverhältnisse eines konjugierten Säure-Base-Paares (d. h. der Konzentrationen der einzelnen chemischen Spezies) in Abhängigkeit vom vorliegenden pH-Wert und wird auch für Titrationen verwendet. Die Darstellung geht auf den schwedischen Chemiker Gunnar Hägg zurück. (de) Is éard is Breacadh Bjerrum (ainmnithe i ndiaidh Niels Bjerrum ) ná graf de thiúchan na speiceas éagsúil d’aigéad polaprótónaigh i dtuaslagán, mar fheidhm de pH, nuair a bhíonn cothromaíocht baint amach ag an tuaslagán. Mar gheall ar an iliomad ord méadaíochta a chuimsíonn na tiúchain, déantar iad a bhreacadh go coitianta ar scála logartamach . Uaireanta déantar cóimheasa na dtiúchan a bhreacadh seachas na tiúchain iarbhír. Uaireanta déantar H + agus OH - a bhreacadh freisin. (ga) Un diagramma di Bjerrum, dal nome del creatore il chimico danese , è un grafico della concentrazione di differenti specie di acidi poliprotici in una soluzione in funzione del pH, quando la soluzione è in equilibrio chimico. Poiché la variazione della concentrazione può differire di parecchi ordini di grandezza, si utilizza spesso una scala logaritmica; a volte si preferisce mettere in grafico i rapporti di concentrazione, al posto delle concentrazioni effettive e occasionalmente si mettono in grafico anche gli ioni H+ e OH−. Viene frequentemente messo in diagramma il sistema del carbonato, dove l'acido poliprotico (in questo caso diprotico) è l'acido carbonico, che può dissociarsi dando luogo a diossido di carbonio, bicarbonato e carbonato. In ambiente acido, la forma dominante è CO2; in ambiente basico è CO32−; nelle condizioni intermedie è HCO3−. Si assume che ad ogni pH la concentrazione di acido carbonico sia trascurabile in confronto alla CO2, e pertanto l'acido non viene riportato nei diagrammi di Bjerrum. Questi diagrammi sono frequentemente utilizzati in chimica oceanica per tracciare la risposta dell'oceano ai cambi sia di pH che di carbonati e CO2. Si possono costruire diagrammi di Bjerrum anche per altri acidi poliprotici come l'acido salicilico, l'acido borico, l'acido solforico e l'acido fosforico. (it) |
| dbo:thumbnail | wiki-commons:Special:FilePath/Carbonate_system_of_seawater.svg?width=300 |
| dbo:wikiPageID | 27395553 (xsd:integer) |
| dbo:wikiPageLength | 11418 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID | 1121520947 (xsd:integer) |
| dbo:wikiPageWikiLink | dbr:Carbon_dioxide dbr:Carbonate dbr:Carbonic_acid dbc:Limnology dbr:Proportionality_(mathematics) dbr:Elementary_reaction dbr:Mole_(unit) dbc:Aquatic_ecology dbr:Base_(chemistry) dbr:Bicarbonate dbr:Boric_acid dbc:Chemical_oceanography dbr:Hydron_(chemistry) dbr:Litre dbc:Water_chemistry dbr:Fresh_water dbr:Concentration dbr:Equilibrium_constant dbr:Logarithmic_scale dbr:Silicic_acid dbr:Henderson–Hasselbalch_equation dbc:Thermodynamics dbr:Ion_speciation dbr:Seawater dbr:Acid_dissociation_constant dbr:PH dbr:Charlot_equation dbr:Chart dbr:Gran_plot dbr:Hill_equation_(biochemistry) dbr:Ions dbc:Geochemistry dbr:Abundance_(chemistry) dbr:Acid dbc:Acid–base_chemistry dbc:Oceanography dbc:Soil_chemistry dbr:Chemical_equilibrium dbr:Sulfuric_acid dbr:Total_inorganic_carbon dbr:Phosphoric_acid dbr:Solution_(chemistry) dbr:Water dbr:Niels_Bjerrum dbr:Thermohaline_circulation dbr:Diprotic_acid dbr:Reaction_rate_constant dbr:Rate_equation dbr:Orders_of_magnitude dbr:Mass_action_law dbr:File:Carbonate_Bjerrum.gif dbr:File:Carbonate_system_of_seawater.svg |
| dbp:wikiPageUsesTemplate | dbt:= dbt:CO2 dbt:Chem dbt:Eqm dbt:NumBlk dbt:Reflist dbt:Short_description dbt:Space dbt:EquationRef dbt:EquationNote |
| dcterms:subject | dbc:Limnology dbc:Aquatic_ecology dbc:Chemical_oceanography dbc:Water_chemistry dbc:Thermodynamics dbc:Geochemistry dbc:Acid–base_chemistry dbc:Oceanography dbc:Soil_chemistry |
| gold:hypernym | dbr:Graph |
| rdf:type | dbo:Software |
| rdfs:comment | Is éard is Breacadh Bjerrum (ainmnithe i ndiaidh Niels Bjerrum ) ná graf de thiúchan na speiceas éagsúil d’aigéad polaprótónaigh i dtuaslagán, mar fheidhm de pH, nuair a bhíonn cothromaíocht baint amach ag an tuaslagán. Mar gheall ar an iliomad ord méadaíochta a chuimsíonn na tiúchain, déantar iad a bhreacadh go coitianta ar scála logartamach . Uaireanta déantar cóimheasa na dtiúchan a bhreacadh seachas na tiúchain iarbhír. Uaireanta déantar H + agus OH - a bhreacadh freisin. (ga) Das Hägg-Diagramm (engl. Hägg's diagram oder bjerrum plot nach Niels Janniksen Bjerrum), auch Speziierungsdiagramm (vgl. Speziierung) genannt, dient in der analytischen Chemie dazu, sich schnell einen Überblick über die Verhältnisse einer wässrigen Säure-, Base- oder Salzlösung bekannter Konzentration zu geben. Es liefert eine doppelt-logarithmische Darstellung der Konzentrationsverhältnisse eines konjugierten Säure-Base-Paares (d. h. der Konzentrationen der einzelnen chemischen Spezies) in Abhängigkeit vom vorliegenden pH-Wert und wird auch für Titrationen verwendet. (de) A Bjerrum plot (named after Niels Bjerrum; sometimes also known as a Sillén diagram or a Hägg diagram) is a graph of the concentrations of the different species of a polyprotic acid in a solution, as a function of pH, when the solution is at equilibrium. Due to the many orders of magnitude spanned by the concentrations, they are commonly plotted on a logarithmic scale. Sometimes the ratios of the concentrations are plotted rather than the actual concentrations. Occasionally H+ and OH− are also plotted. (en) Un diagramma di Bjerrum, dal nome del creatore il chimico danese , è un grafico della concentrazione di differenti specie di acidi poliprotici in una soluzione in funzione del pH, quando la soluzione è in equilibrio chimico. Poiché la variazione della concentrazione può differire di parecchi ordini di grandezza, si utilizza spesso una scala logaritmica; a volte si preferisce mettere in grafico i rapporti di concentrazione, al posto delle concentrazioni effettive e occasionalmente si mettono in grafico anche gli ioni H+ e OH−. (it) |
| rdfs:label | Hägg-Diagramm (de) Bjerrum plot (en) Breacadh Bjerrum (ga) Diagramma di Bjerrum (it) |
| owl:sameAs | freebase:Bjerrum plot wikidata:Bjerrum plot dbpedia-da:Bjerrum plot dbpedia-de:Bjerrum plot dbpedia-ga:Bjerrum plot dbpedia-it:Bjerrum plot https://global.dbpedia.org/id/4ZSK3 |
| prov:wasDerivedFrom | wikipedia-en:Bjerrum_plot?oldid=1121520947&ns=0 |
| foaf:depiction | wiki-commons:Special:FilePath/Carbonate_system_of_seawater.svg wiki-commons:Special:FilePath/Carbonate_Bjerrum.gif |
| foaf:isPrimaryTopicOf | wikipedia-en:Bjerrum_plot |
| is dbo:knownFor of | dbr:Gunnar_Hägg |
| is dbo:wikiPageDisambiguates of | dbr:Bjerrum |
| is dbo:wikiPageRedirects of | dbr:A_Bjerrum_plot |
| is dbo:wikiPageWikiLink of | dbr:Calcium_carbonate dbr:Carbon_dioxide dbr:Carbonic_acid dbr:Pourbaix_diagram dbr:Bjerrum dbr:Ion_speciation dbr:Ionic_bonding dbr:Charlot_equation dbr:Hill_equation_(biochemistry) dbr:Gunnar_Hägg dbr:Solubility_pump dbr:Acid dbr:Total_inorganic_carbon dbr:Dissolved_inorganic_carbon dbr:Ocean_acidification dbr:Niels_Bjerrum dbr:Paleosalinity dbr:Revelle_factor dbr:Outline_of_oceanography dbr:A_Bjerrum_plot |
| is dbp:knownFor of | dbr:Gunnar_Hägg |
| is foaf:primaryTopic of | wikipedia-en:Bjerrum_plot |
