Which of the following causes the sharpest change in the equivalence point of a complexometric titration? A. Increasing the concentration of the EDTA solution B. Decreased concentration of the analyte C. Increasing the concentration of the EDTA solution D. Increasing the stability of the [metal-EDTA] complex
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Which of the following causes the sharpest change in the equivalence point of a complexometric titration?
A. Increasing the concentration of the EDTA solution
B. Decreased concentration of the analyte
C. Increasing the concentration of the EDTA solution
D. Increasing the stability of the [metal-EDTA] complex
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- Which of the following causes the sharpest change in the equivalence point of a complexometric titration? a) Increasing the concentration of the EDTA solution b) Decreased concentration of the analyte c) increase the stability of the [metal-EDTA] complex11.Residual EDTA titrations are employed in the analysis of Bi and ________ containing compounds. 12.The equilibrium constant that drives complexation reactions to completion is known as?In complexation volumetry, classify the statements below as true or false.Justify the one(s) that you judge to be “false”.a) When preparing an EDTA solution, to be used as a titrant of Ca2+ ions, it is necessary to add a small amount of Mg2+ in the solution.b) A metallochromic (Ind) indicator is a substance that forms colored complexes with metallic ions. The colors of these complexes are always the same as the colors of the free forms of these indicators.c) In order for the titration of a metal (Me) with EDTA to be carried out, it is necessary that the Me-EDTA complex has a stability constant greater than that of the Me-Ind complex.d) In determining the partial hardness of a hard water sample with EDTA solution, murexide is used as an indicator at pH 10.
- Which of the following statements about the indicators used in Edta titrations is false?A. The strength of the complex made with the metal ion should be less than the complex of the same metal with EDTA.B. Metal indicators are used to determine the turning point in complexometric titrations.C. They should form water-soluble colored chelate complexes with metals.D. The complex formation constant of the complex made with metal ions must be very low.The following statements are ways to mitigate EDTA titration's low sensitivity EXCEPT A. Buffer at specific pH to avoid other metal ions to complex with EDTA B. Use of masking agents to react with other cations C. Using higher concentration of EDTA titrant D. Use of optimal form of EDTA that will complex with the target metal ion/s E. None of the choices.Calculation at the equivalence point of a complexation titration: What is the pSr value of a 50.00 mL solution of 0.01000 M Sr2+ (formation constant, Kf = 5.348 x 108) after the addition of 25.00 mL of 0.02000 M EDTA which was buffered to pH 11.00? Round your final answer to two decimal places to the right of the decimal point.
- (ii) Consider the titration of 25.00 mL of 0.02000 M CaSO4 with 0.01000 M EDTA at pH 10.00. Write the chemical equation for this titration and calculate the conditional formation constant for this reaction. (iii) From (ii) calculate the concentration of Ca2+ and pCa2+ at the volume of 20.0 mL of EDTA added.Explain why in Mohr's method neutral medium should be used in titration of AgNO3?Calculation of the Solubility from EDTA Titration Data 1. A 10.0 mL sample of supernatant liquid was titrated with 0.01022 M EDTA solution. It required 16.90 mL of EDTA to reach the end point. Calculate the [Ca^ 2+ ] and hence the solubility of CaSO 4 in 10.0 mL sample. 2. List important practical applications of complexometric titration of Ca^ 2+ ions . Please show all steps
- An auxiliary competing agent is used in EDTA titrations to slow down the titration. keep some interfering component of the analyte mixture from complexing with the EDTA. speed up the titration. keep the metal ion from precipitating out of the solution.What is the basis of the ‘40000’ in the equation? Note: this is about "DETERMINATION OF WATER HARDNESS BY EDTA TITRATION"9. The titrant in the complexometric method is: A) Nitrilotriacetic acid B) Ethylenediamine triacetic acid B) Ethylenediaminetetraacetic acid D) Disodium salt of ethylenediamitetraacetic acid E) Diaminocyclohexanetetraacetic acid