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Consider Table 1, which lists the volumes of the Fe3+ and SCN- solutions used for the continuous variation method. Note that each of the stock solutions is 0.002 M before mixing. What are the initial concentrations of Fe3+ and SCN- for solution 4, where the volumes are both 5 mL? [Initial meaning after they are mixed, but before]they reach equilibrium)

Consider Table 1, which lists the volumes of the Fe3+ and SCN- solutions used for the continuous variation method. Note that each of the stock solutions is 0.002 M before mixing. What are the initial concentrations of Fe3+ and SCN- for solution 4, where the volumes are both 5 mL? [Initial meaning after they are mixed, but before]they reach equilibrium)

Fundamentals Of Analytical Chemistry
Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter13: Titrations In Analytical Chemistry
Section: Chapter Questions
Problem 13.12QAP
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Consider Table 1, which lists the volumes of the Fe3+ and SCN- solutions used for the continuous variation method. Note that each of the stock solutions is 0.002 M before mixing.

What are the initial concentrations of Fe3+ and SCN- for solution 4, where the volumes are both 5 mL? [Initial meaning after they are mixed, but before]they reach equilibrium)

 

 

456 7 water. Measure the absorba tion at 450 nm, following the procedures given b.. your for the instruent in tion at the procedures by your [If measures only %T, you can the of solu- you have until you and tion by the solutions adjust 3. Calculating and set the 100 Reaction Thre the equilibrium so three inde your laboratory. [If your instrument measures only determine thes equations we expression plotted the absorbance values as described in part 2 In the Method of Continuous TABLE 24-1 Variation, the Total Solution Volume Is Kept and two mat Constant for all the Fe 0.00200 M Solution (mL) in the solutic Fe(NO3)3 KSCN Tube Number 2. dThe ma 9. 3. the Fe(III)- cyanate-co amounts o into the sc 0. given by t 2The mole fraction of Fe(III) is fundamentally defined as mol Fe(III)/[mol Fe(III) + mol KSCN]. But because the number of moles of each substance is equal to the volume times the molarity of the solution, and because the molarities of the solutions are equal, the mole fraction is equal to the volume relationship of Equation (12). Cp and
Transcribed Image Text:456 7 water. Measure the absorba tion at 450 nm, following the procedures given b.. your for the instruent in tion at the procedures by your [If measures only %T, you can the of solu- you have until you and tion by the solutions adjust 3. Calculating and set the 100 Reaction Thre the equilibrium so three inde your laboratory. [If your instrument measures only determine thes equations we expression plotted the absorbance values as described in part 2 In the Method of Continuous TABLE 24-1 Variation, the Total Solution Volume Is Kept and two mat Constant for all the Fe 0.00200 M Solution (mL) in the solutic Fe(NO3)3 KSCN Tube Number 2. dThe ma 9. 3. the Fe(III)- cyanate-co amounts o into the sc 0. given by t 2The mole fraction of Fe(III) is fundamentally defined as mol Fe(III)/[mol Fe(III) + mol KSCN]. But because the number of moles of each substance is equal to the volume times the molarity of the solution, and because the molarities of the solutions are equal, the mole fraction is equal to the volume relationship of Equation (12). Cp and
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