3. A 100 mL sample of hard water is titrated with 22.4 mL of the EDTA solution from problem 2. The same amount of MgCl, is added as previously and the total volume of EDTA solution required is 22.44 mL. a) What volume of EDTA is used in titrating the Ca2+ in the hard water? mL

3. A 100 mL sample of hard water is titrated with 22.4 mL of the EDTA solution from problem 2. The same amount of MgCl, is added as previously and the total volume of EDTA solution required is 22.44 mL. a) What volume of EDTA is used in titrating the Ca2+ in the hard water? mL

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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If an unknown consisted of Co+2, Fe+2, Sr+2, or Ni+2, which cation would completely complex with EDTA first? Second? Third? Also, what are the minimum pH values for satisfactory titrations of the above metal cations?
Calculations: Standardization of HCl Titrating Solution: Using your best two or three standardization titrations, calculate the concentration of the HCl titrating solution for each trial using the balanced equation between HCl and Na2CO3. What is the average concentration of your HCl solution? Ksp Determination at both temperatures Calculate the room temperature Ksp for borax. From the HCl volume used in each titration, calculate the concentration of borate in each room temperature aliquot using the equation between HCl and borate From the stoichiometric relationship between borate and sodium ion, calculate [Na+ ] in each aliquot. Calculate the room temperature Ksp for each titration using the following equation calculate the average Ksp value. Ice Bath Temperature Ksp Determination: Calculate Ksp for borax as you did for the room temperature system. Calculate the concentration of borate in each ice temperature aliquot. Calculate [Na+ ] for each ice temperature aliquot.…
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…
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A solution containing 60 mL of a 0.025 mol / L metal ion (Mn +) buffer buffered to pH 7.0 was titrated with a 0.05 mol / L EDTA solution. Data: Conditional formation constant (Kf)=10^15. Determine: i) The concentration of the free metal when ½ of the equivalence volume is added. ii) the concentration of free metal in the equivalence volume. iii) the concentration of free metal with an excess of 2 mL of EDTA? (Data - EDTA constants: K1=0.01; K2=2.19.10^-3; K3=6.92.10^-7; K4=5.75.10^-11)
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3. A 100 mL sample of hard water is titrated with 22.4 mL of the EDTA solution from problem 2. The same amount of MgCl, is added as previously and the total volume of EDTA solution required is 22.44 mL. moles c) How many moles of Ca²* are in 100 mL of water?
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