# Chemistry

posted by .

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

## Similar Questions

1. ### chemistry

Why does an iron ion attract a sulfide ion but not a zinc ion?
2. ### chemistry

Which if the following statements concerning complex ion Co(en)2Cl2+ is true?
3. ### chemistry

write the formula for and indicate the charge on each of the following ions: a) sodium ion b) aluminum ion c) chloride ion d) nitride ion e e)iron (II) ion f) iron (III) ion
4. ### Chemistry

Suppose you want a mixture that contains 2.5 grams of iron ion and three times as many moles of oxalate ion as moles of iron. If the iron comes from iron(iii)chloride and the oxalate ion from K2C2O4, how many grams of each of the compounds …
5. ### Chemistry

23. Ductility is the ability to be hammered into sheets.- F?
6. ### Chemistry

The following questions refer to the following system: 500 mL of 0.02 M Mn(NO3)2 are mixed with 1.0 L of 1.0 M Na2C2O4. The oxalate ion, C2O4, acts as a ligand to form a complex ion with the Mn+2 ion with a coordination number of two. …
7. ### Chemistry

Currently studying for an lab exam. Just have a few question about a typical Iodine Clock reaction lab. In an typical Iodine Clock reaction lab what would be the state of effect of an increase in the initial concentration of persulfate …
8. ### Chemistry

Currently studying for an lab exam. Just have a few question about a typical Iodine Clock reaction lab. In an typical Iodine Clock reaction lab what would be the state of effect of an increase in the initial concentration of persulfate …
9. ### chemistry

Suppose that 2.25 grams of CuSO4 are dissolved in 930 mLs of 0.30 M ammonia. What concentration (Molarity) of Cu2+ ion is expected to be free in the aqueous solution and not bound to ammonia in the complex ion Cu(NH3)42+?
10. ### Chemistry

Kc is 1.67 × 1020 at 25°C for the formation of iron(III) oxalate complex ion: Fe3+(aq) + 3 C2O42-(aq) [Fe(C2O4)3]3-(aq). If 0.0200 M Fe3+ is initially mixed with 1.00 M oxalate ion, what is the concentration of Fe3+ ion at equilibrium?

More Similar Questions