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18 Nov 2019
The chemist I. N. Vino Veritas acquired the data shown below in a Job's method determination of the equilibrium constant for the formation of the iron (III) thiocyanate ion: Fe^+3 (aq) + SCN^-1(aq) = FeSCN^+2 (aq). The equilibrium constant is given by K = [FeSCN^+2]/[Fe^+3 ISCN^-1] = c_3/c_1c_2 Veritas's data at 480 nm: Absorbance, A = 0.303 for a solution with mu = 1/3. The stock solutions were at the same concentration of c_0 = 0.00100 M. The path length was b = 1.00 cm. Use this data to find the concentrations to four significant digits to avoid round off error, but report the equilibrium constant to three: Jack Jobs decided to use the method of continuous variation to determine the stoichiometry (n) of the complex formed between Ni^+ 2 and 1, 2 diaminoethane(ethylenediamine). For simplicity we'll abbreviate the ligand as EN and ignore the waters of hydration. Ni^+2 (aq) + n EN_(aq) = NiEN^+2 (aq) What is mu_max? What is n? What is the K expression?
The chemist I. N. Vino Veritas acquired the data shown below in a Job's method determination of the equilibrium constant for the formation of the iron (III) thiocyanate ion: Fe^+3 (aq) + SCN^-1(aq) = FeSCN^+2 (aq). The equilibrium constant is given by K = [FeSCN^+2]/[Fe^+3 ISCN^-1] = c_3/c_1c_2 Veritas's data at 480 nm: Absorbance, A = 0.303 for a solution with mu = 1/3. The stock solutions were at the same concentration of c_0 = 0.00100 M. The path length was b = 1.00 cm. Use this data to find the concentrations to four significant digits to avoid round off error, but report the equilibrium constant to three: Jack Jobs decided to use the method of continuous variation to determine the stoichiometry (n) of the complex formed between Ni^+ 2 and 1, 2 diaminoethane(ethylenediamine). For simplicity we'll abbreviate the ligand as EN and ignore the waters of hydration. Ni^+2 (aq) + n EN_(aq) = NiEN^+2 (aq) What is mu_max? What is n? What is the K expression?