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11 Nov 2019
A reaction mixture of 4.00 mL of 0.00200 M SCN and 5.00mL of 0.00200 M Fe3+ is diluted to 10.00 mL with 0.1 M HNO3 to form the blood-red FeNCS2 complex. The equilibrium molar concentration of the FeNCs2+ determined from a calibration curve, is 1.5 x 10-4 mol/L. Calculate, in sequence, each of the following quantities in the aqueous solution to determine the equilibrium constant for the reaction, Fe3 (aq) SCN (ag) FeNCS2+ (aq) 1. moles of FeNCS2 that form in reaching equilibrium 2 moles of Fe that react to form the FeNCS2 at equilibrium 3. moles of SCN' that react to form the FeNCS2 at equilibrium 4 moles of Fe3 initially placed in the reaction system 5. moles of SCN-initially placed in the reaction system 6. moles of Fe3 (unreacted) at equilibrium 7. moles of SCN (upreacted) at equilibrium 8. molar concentration of Fe3 (unreacted) at equilibrium 9. molar concentration of SCN (unreacted) at equilibrium 10. molar concentration of FeNCS2+ at equilibrium 1.5 x104 mol/L
A reaction mixture of 4.00 mL of 0.00200 M SCN and 5.00mL of 0.00200 M Fe3+ is diluted to 10.00 mL with 0.1 M HNO3 to form the blood-red FeNCS2 complex. The equilibrium molar concentration of the FeNCs2+ determined from a calibration curve, is 1.5 x 10-4 mol/L. Calculate, in sequence, each of the following quantities in the aqueous solution to determine the equilibrium constant for the reaction, Fe3 (aq) SCN (ag) FeNCS2+ (aq) 1. moles of FeNCS2 that form in reaching equilibrium 2 moles of Fe that react to form the FeNCS2 at equilibrium 3. moles of SCN' that react to form the FeNCS2 at equilibrium 4 moles of Fe3 initially placed in the reaction system 5. moles of SCN-initially placed in the reaction system 6. moles of Fe3 (unreacted) at equilibrium 7. moles of SCN (upreacted) at equilibrium 8. molar concentration of Fe3 (unreacted) at equilibrium 9. molar concentration of SCN (unreacted) at equilibrium 10. molar concentration of FeNCS2+ at equilibrium 1.5 x104 mol/L
Hubert KochLv2
15 Jul 2019