Write the reaction for the formation of FeNCS^2+. Write the equilibrium constant

Question

Write the reaction for the formation of FeNCS^2+. Write the equilibrium constant expression for the formation of FeNCS^2+ What FeNCS^2+ concentrations in solutions 1 through 6 are used for the calibration Calculate the value of K_eq from the following equilibrium concentrations: [FeNCS^2+] = 1.71 times 10^-4 M, [Fe^3+] = 8.28 times 10^-4 M, and [SCN^-] = 4.28 times 10^-4 M. State the Beer-Lambert law and define all terms in it. Does absorbance increase or decrease as the solution concentration of the

Explanation / Answer

Ans 1-

The reaction of formation of FeNCS2+ is -

Fe3+ (aq)+ NCS-(aq) ---------------------> FeNCS2+ (aq)

(yellow) (colorless) (red)

FeNCS2+ is known as Iron (III) Thiocyanade

Ans 2 -The equllibrium constant can be written as -

K(eq) = [FeNCS2+] / [Fe3+ ] [NCS-] we have tp use the standard curve to to determine FeNCS2+ via experiment which is experimental determination of equllibrium concentration of complex .The equilibrium concentrations of the other two ions is determined using the 1:1 stoichiometry of the reaction:-

[Fe3+ ] = [Fe3+ ]o - [FeNCS2+]aq

[NCS-] = [NCS-]o - [FeNCS2+]aq

[Fe3+ ]o and  [NCS-]o are initial ,analytical concentrations .

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.