19 Questions
What is the purpose of titration methods in Analytical Chemistry?
To determine the volume of a known solution needed to react with the analyte
What is the role of an Analyte (Titrand) in a titration?
It is a solution of unknown concentration but known volume
What is a characteristic of back-titration in titrations?
It determines the excess of standard solution used to consume an analyte
What is the equivalence point in a titration?
The point when the added standard reagent equals the analyte
What distinguishes an end point from an equivalence point in titrations?
An end point indicates when to stop titration, while an equivalence point is associated with chemical equivalence
When is back-titration often required in titrations?
When the standard solution lacks stability
In the Volhard method, why is AgCl precipitate filtered before undertaking the back titration?
To prevent interference in the subsequent reaction
What is the purpose of using a strong acid solution in the Volhard method?
To prevent hydrolysis of the analyte
Which type of indicator is commonly used in the Volhard method?
Specific indicator
Why does the Mohr method not use for the determination of I-1?
Iodine forms a complex with Ag+1 that affects the titration endpoint
What is the purpose of using specific indicators in redox titrations?
To provide a sharp color change at the equivalence point
Why is the pH range of 6.5-9 crucial in the Mohr method?
To prevent hydrolysis of AgCl precipitate
What is the purpose of using an indicator in a titration process?
To produce an observable physical change at or near the equivalence point
Why are weak acids and bases not used as standard reagents in acid-base titrations?
They react incompletely with analytes
In a strong acid + weak base titration, what is the pH at the equivalence point?
pH < 7
What type of complex formation occurs in complexometric titrations?
Formation of a complex between metal ions and ligands
What is the role of an ion or molecule that forms a covalent bond with a metal atom by donating a pair of electrons?
Complexing agent
Why is EDTA considered a widely used complexometric titrant?
It forms a weak complex with metal ions
What type of ligand has two groups available for covalent bonding?
Bidentate
Explore the principles of titration methods in analytical chemistry, which involves quantitatively measuring the quantity of a reagent required to react completely with an analyte. Learn about the different types of titrations and the components involved in the process.
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