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Titration defn's

TermDefinition
Titration type of volumetric analysis in which increments of reagent are added until the reaction between titrant and analyte is complete
Titrant reagent solution
Requirements for titration -reaction must have large equilibrium constant -reaction must occur rapidly -analyte has to be completely used up
Titration examples -acid base -oxidation-reduction -complex formation -precipitation
Equivilence point -when quantity of titrant added is amount necessary for reactino to occur with analyte, theoretical result
End point -actual measurement, marked by sudden change in physical property of solution
titration error the difference between the end point volume and the equivilence point volume
Blank titration -titrating a similar solution without analyte to provide estimation of titration error
Indicator compound with a physical property (usually color) that will change drastically near equivilence point.
Primary standard a reagent which can be weighed easily, and which is so pure that its weight is truly representative of the number of moles of substance contained
Direct titration adding titrant till reaction is complete
back titration -add known excess to one standard reagent -titrate excess with second standard reagent Uses -when end point of back titration is clearer than direct titration
Gravimetric titration measure mass of titrant delivered in each increment, improves precision
Titration curves plots of analyte concentration vs volume or titrant added and shows how the concentration of the reactant changes as more titrant is added
Created by: zoey.stevenson
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