[biomed77]

cyanide ions are poisonous because they complex with Fe2+ and Fe3+ ions in haemoglobin and in enzymes. the equilibrium is: Fe3+  +  6CN <--->[Fe(CN)6]-3
write an expression for the equilibrium constant Kc and calculate a value for Kc if the concentration were found to be
Fe3+= 1*10^-6   CN- = 3*10^-6    [Fe(CN)6]3- =  1*10mol dm^-3

Aswer: T he equation  for Kc is:  Kc=[Fe(CN)6 3-] / [Fe3+][CN-]^6

so Kc= [1*10^-8] / [1*10^-6][3*10^-6]^6
= 1.37*10^31
can someone please tell me if it is right?? thanks a lot

[Albert]

Yes, it is. I think I already answered this very question.

[biomed77]

thank you, it was a previous question that you ve answered...thanks again