Pentaammine sulphatocobalt(III) Bromide yields a dull yellow ppt. with AgNO3 while Pentaammine bromidocobalt(III) Sulphate does not. why?

Dear Student,

Pentamminesulphatocobalt(III) bromide is [Co(NH3)5(SO4)] Br while ​Pentamminebromidocobalt(III) sulphate is [Co(NH3)5Br]  SO4
In ​ [Co(NH3)5(SO4)] Br, Br is ionisable and so it can react with AgNO3 to give AgBr which is the yellow ppt. while in ​​, Br is inside the coordination sphere and so in non-ionisable and will not give a yellow ppt of AgBr. 
[Co(NH3)5(SO4)] Br + AgNO3 AgBr                                                        (yellow ppt.)[Co(NH3)5Br]  SO4  + AgNO3  Ag2SO4                                                         (white ppt.)                                        
 

  • -1
What are you looking for?