16 Questions
What is the purpose of an indicator in volumetric titrimetric analysis?
To signal when the end point of the reaction has occurred
What is the equivalence point in a titration?
The point when the amount of added standard reagent is exactly equivalent to the amount of analyte
What is a standard solution in titrimetric analysis?
A reagent of exactly known concentration used in a titrimetric analysis
In which type of titrimetric analysis is the volume of a standard reagent the measured quantity?
Volumetric titrimetric
What is the end point in a titration?
The point when a physical change occurs associated with chemical equivalence
What term is used for the process in which a standard reagent is added to a solution until the reaction between the analyte and reagent is judged to be complete?
Titration
What is the purpose of using indicators in titration?
To produce an observable physical change at the equivalence point
When is back-titration used in titrimetric analysis?
When the rate of reaction between the analyte and reagent is slow
What is the purpose of using a secondary standard in titrimetric analysis?
To establish the purity of the compound by chemical analysis
What are important requirements for a primary standard?
Absence of hydrate water to prevent changes in composition with humidity variations
Why do very few compounds meet or even approach the criteria for a primary standard?
Because established methods for confirming purity are available for very few compounds
What is an ideal property of a standard solution for titrimetric methods?
Sufficient stability requiring determination of its concentration only once
What is the purpose of using a measured excess of standard silver nitrate in titrimetric analysis?
To determine the excess amount of standard titrant
Why are back-titrations often required in titrimetric analysis?
To determine the excess amount of the standard titrant
What role do standard solutions play in titrimetric methods of analysis?
React more or less completely with the analyte to ensure satisfactory end points
Why are less pure compounds sometimes used as secondary standards instead of primary standards?
Because their purity cannot be established by chemical analysis
Test your knowledge of volumetric analysis and titrimetric methods in Analytical Chemistry. This quiz covers the process of titration, standard reagents, and different types of chemical reactions involved in volumetric titrimetric methods.
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