For one of the solutions you make up for this week's experiment,7.00 mL of 2.0E-3 M iron(III) nitrate solution is mixed with 2.00mL of 2.0E-3 M potassium thiocyanate solution, 3.00 mL of 0.500 Mnitric acid solution, and 8.00 mL of distilled water for a totalvolume of 20.00 mL. What is the initial concentration of Fe3+ ionsin this solution, in other words, what is the concentration of Fe3+ions before any reaction with the thiocyanate?
Initial concentration of Fe3+ =
Calculate the mole fractions of Fe3+ and SCN- in this solution withrespect to the total number of moles of Fe3+ and SCN-. This means,of course, that these two mole fractions should add up to1.00.
Mole fraction of Fe3+ = ????
Mole fraction of SCN- = ????
Suppose that the mole fraction of Fe3+ in the iron(II) -thiocyanate solution was plotted against the absorbance of thesolution at 450 nm. Suppose also that the maximum absorbance wasestablished at a mole fraction of Fe3+ equal to 0.400 by plottingthe two best straight lines through the data points. What is thestoichiometry of the complex formed between the Fe3+ and thethiocyanate?
Enter the answer as a whole number ratio; whole numbers separatedby a colon (for example, 2:3, indicating a stoichiometryFe2(SCN)3).
Stoichiometry of the complex formed between Fe3+ and SCN- = ????
For one of the solutions you make up for this week's experiment,7.00 mL of 2.0E-3 M iron(III) nitrate solution is mixed with 2.00mL of 2.0E-3 M potassium thiocyanate solution, 3.00 mL of 0.500 Mnitric acid solution, and 8.00 mL of distilled water for a totalvolume of 20.00 mL. What is the initial concentration of Fe3+ ionsin this solution, in other words, what is the concentration of Fe3+ions before any reaction with the thiocyanate?
Initial concentration of Fe3+ =
Calculate the mole fractions of Fe3+ and SCN- in this solution withrespect to the total number of moles of Fe3+ and SCN-. This means,of course, that these two mole fractions should add up to1.00.
Mole fraction of Fe3+ = ????
Mole fraction of SCN- = ????
Suppose that the mole fraction of Fe3+ in the iron(II) -thiocyanate solution was plotted against the absorbance of thesolution at 450 nm. Suppose also that the maximum absorbance wasestablished at a mole fraction of Fe3+ equal to 0.400 by plottingthe two best straight lines through the data points. What is thestoichiometry of the complex formed between the Fe3+ and thethiocyanate?
Enter the answer as a whole number ratio; whole numbers separatedby a colon (for example, 2:3, indicating a stoichiometryFe2(SCN)3).
Stoichiometry of the complex formed between Fe3+ and SCN- = ????
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