Which rapid and quantitative analysis requires a sample solution of metal ion to be titrated against a standard solution of EDTA, in the presence of a buffer?*   Alkalimetric Replacement Back Titration Direct   Which agent is added into a solution if direct titration is deemed to proceed slowly?*   Indicator Titrant Catalyst Demasking agent   Which method uses an excess solution of EDTA added to a sample and then pH is adjusted for back titration with a metal ion solution?*   Replacement Residual Alkalimetric Direct   Which reagent will form a more stable complex with interfering ions rather than the with the indicator and EDTA?*   Masking agents Demasking agents Chelating agents Complex agents   Which of the following contains a set of incorrectly paired words?* Chelatometry - Complexation / Precipitimetry - Argentometric Lewis acid - electron acceptor / Lewis base - electron donor Titrant + Indicator / Analyte + sample

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Chapter1: Chemical Foundations
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Which rapid and quantitative analysis requires a sample solution of metal ion to be titrated against a standard solution of EDTA, in the presence of a buffer?*
 
Alkalimetric
Replacement
Back Titration
Direct
 
Which agent is added into a solution if direct titration is deemed to proceed slowly?*
 
Indicator
Titrant
Catalyst
Demasking agent
 
Which method uses an excess solution of EDTA added to a sample and then pH is adjusted for back titration with a metal ion solution?*
 
Replacement
Residual
Alkalimetric
Direct
 
Which reagent will form a more stable complex with interfering ions rather than the with the indicator and EDTA?*
 
Masking agents
Demasking agents
Chelating agents
Complex agents
 
Which of the following contains a set of incorrectly paired words?*
Chelatometry - Complexation / Precipitimetry - Argentometric
Lewis acid - electron acceptor / Lewis base - electron donor
Titrant + Indicator / Analyte + sample
Direct titration = for Ca and Mg / Indirect titration - for Al and Bi
 
Which is the Lewis base in a complexation reaction?*
Metal
Ligand
Complex
Hydroxide ion
 
At what pH does EDTA become a strong complexing agent?*
4
6
8
10
Which best describes the characteristic of an indicator in a direct EDTA titration?*
 
Binds with the ligand and changes color when freed
Binds with the metal and changes color when freed
Changes color when binding with the complex formed
The ligand itself is the indicator
 
Which of the following does NOT form a 1:1 ratio with an EDTA molecule?*
Li
Mg
Bi
Al
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