Question
I'm doing a chemistry lab called colorimetric equilibrium study of a complex ion. But I just have one question which is how to obtain CS which is the total stoichiometric molarity of thiocynate ion and CF which is iron (III) iron.
Fe+3 + SCN --> Fe(NCS)^+2
Fe(NCS)^+2 + SCN ---> Fe(NCS) (SQUARED ON THE BOTTOM OF (NCS)
Fe(NCS)^-2 (SQUARED ON THE BOTTOM OF (NCS) BUT BY A FACTOR OF 5
+ SCN ---> Fe(NCS)^-3 (SQUARED ON THE BOTTOM OF (NCS) BUT BY A FACTOR OF 6
This lab is stating CS AND CF can be expressed as the sum of the equilibrium concentrations of the various species.
CS = [SCN] + [Fe(NCS)]
CF = [Fe] + [Fe(NCS)]
Concentration:
[KSCN]= 0.002 M
[HNO3] = 0.5 M
[FeNO3] = 0.1 M
Would I need the absorbance and volume to calculate CF and CS? If so, how do I calculate CF and CS? I was wondering the concentrations would equal to [SCN] and etc but I believe I'm wrong since the absorbance has to be used in order to calculate CF and CS.
thank you very much for any help
Fe+3 + SCN --> Fe(NCS)^+2
Fe(NCS)^+2 + SCN ---> Fe(NCS) (SQUARED ON THE BOTTOM OF (NCS)
Fe(NCS)^-2 (SQUARED ON THE BOTTOM OF (NCS) BUT BY A FACTOR OF 5
+ SCN ---> Fe(NCS)^-3 (SQUARED ON THE BOTTOM OF (NCS) BUT BY A FACTOR OF 6
This lab is stating CS AND CF can be expressed as the sum of the equilibrium concentrations of the various species.
CS = [SCN] + [Fe(NCS)]
CF = [Fe] + [Fe(NCS)]
Concentration:
[KSCN]= 0.002 M
[HNO3] = 0.5 M
[FeNO3] = 0.1 M
Would I need the absorbance and volume to calculate CF and CS? If so, how do I calculate CF and CS? I was wondering the concentrations would equal to [SCN] and etc but I believe I'm wrong since the absorbance has to be used in order to calculate CF and CS.
thank you very much for any help
Answers
Related Questions
in a class of 35 students twice as many study chemistry and study physics half a many study chemistr...
In a class of 80 students,53 study Art,60 study biology,36 study Art and biology,34 study Art and ch...
In a class of 40 students, 22 study Art, 18 study Biology, 6 study only Chemistry. 5 study all the t...
In a class of 40 pupils,30 students study biology,22 study physics and 21 study chemistry,2 study ph...