Complexometric TitrationComplexometric titration is a method used to determine metal ion concentrations by forming stable complexes, often with EDTA. A color change from an indicator marks the endpoint, indicating that all metal ions have reacted. This technique is widely used in testing water hardness and analyzing metal ions in solutions. 1 / 11What is complexometric titration primarily used for? Determining the concentration of acids and bases Measuring the concentration of oxidizing agents Determining metal ions in a solution Identifying the pH of solutions 2 / 11Which of the following is commonly used as a chelating agent in complexometric titrations? Phenolphthalein Potassium permanganate Ethylenediaminetetraacetic acid (EDTA) Sodium chloride 3 / 11EDTA is a type of: Acid-base indicator Complexing agent Reducing agent Precipitating agent 4 / 11In complexometric titration, the indicator Eriochrome Black T changes color when it: Binds to free metal ions Binds to EDTA Reaches endpoint in acidic solutions Is in the presence of strong oxidizers 5 / 11Which metal ion is typically determined using complexometric titration with EDTA? Chloride ions Iron ions Calcium ions Nitrate ions 6 / 11What color does the Eriochrome Black T indicator turn when the endpoint of a titration involving calcium ions is reached? Red to blue Yellow to red Green to purple Blue to yellow 7 / 11Which of the following metals cannot be easily titrated with EDTA due to its instability in solution? Magnesium Zinc Silver Copper 8 / 11The formation constant (Kf) for the EDTA complex with a metal ion is typically high because: EDTA forms weak bonds with metal ions EDTA has multiple binding sites, leading to a stable complex EDTA is soluble in both acidic and basic solutions EDTA does not form stable complexes with transition metals 9 / 11In complexometric titration, which of the following metals forms the most stable complex with EDTA? Calcium Magnesium Copper Sodium 10 / 11The EDTA molecule binds to metal ions through which type of binding? Ionic bonds only Van der Waals forces Coordinate covalent bonds Hydrogen bonds 11 / 11Which indicator is used in the complexometric titration of nickel ions with EDTA? Murexide Eriochrome Black T Phenolphthalein Methyl orange Your score isThe average score is 61% 0% Restart quiz
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