Unit 55 Quantitative methods of analysis

Accuracy

Accuracy - the accuracy of a method is the closeness of the measured value to the true value for the sample

Desiccator

Desiccator - in which dried materials may be stored while they cool to minimize the uptake of moisture

Gravimetric analysis

Gravimetric analysis - involves determining the mass of the species being analyzed or the mass of a compound chemically related to that species

Mother liquor

Mother liquor - the solution from which a precipitate is precipitated

Permanganate index of water

Permanganate index of water - indicates the amount of permanganate consumed when the oxidizable matter in a water sample is oxidized by the permanganate

Random error

Random error - an experimental error which causes measurements to be distributed randomly on either side of the true value. Random error exists in every measurement. We can never eliminate the effect of rando

Redox titration

Redox titration - like an acid-alkaline titration; a similar procedure used to determine the concentration of an oxidizing agent or a reducing agent 

Sensitivity

Sensitivity - the sensitivity of a method is the ability to distinguish between two different concentrations

Sintered glass filtering crucible

Sintered glass filtering crucible - the porous glass bottom of the crucible allows liquid to pass but retains solids for filtering purpose, enabling the filtration, drying and weighing steps to be completed i

Standardize

Standardize - it is necessary to standardize a solution of the chosen reagent to obtain its accurate concentration prior to its use for titrimetric analysis

Systematic error

Systematic error - an experimental error which arises from a flaw in equipment, operations during the experiment or the design of the experiment. We cannot eliminate such an error by repeating the measurement

Titrant

Titrant - the reagent of known concentration added to the species being analyzed during titration

Titration

Titration - a process which involves measuring the volume of a solution containing sufficient reagent to react completely with the species being analyzed during a volumetric analysis

Volumetric analysis

Volumetric analysis - involves measuring the volume of a solution containing sufficient reagent to react completely with the species being analyzed in a process called titration

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