Mant times I have tried this experiment but every time I get a precipitate. I take some zinc chloride soln. in a test tube ,add NH4Cl in it and then
add NH4OH but always i get a ppt and according to this book Zinc ions should not ppt due to common ion effect and their higher solubility product .
Same thing is happening with manganese instead of precipitating in group 4 they get ppt in group 3 .
Guys please try this and tell is same happening with you
These are photos of that book . You may understand from this what I want to say
Metacelsus - 8-3-2018 at 06:55
Zinc hydroxide is insoluble, but in excess ammonia it dissolves to form an ammine complex. If you want it to dissolve, try adding more ammonia.Akhil jain - 8-3-2018 at 10:05
I know that it dissolves in excess ammonia but what about the analysis .you aren't getting my point . What about common ion effect Akhil jain - 9-3-2018 at 11:55
Plz try the experiment and tell me did the same happened with youDraconicAcid - 9-3-2018 at 12:28
You need to add more ammonium chloride if you want to see the common ion effect in action.Akhil jain - 10-3-2018 at 12:09
You need to add more ammonium chloride if you want to see the common ion effect in action.
Ya bro you were right . I tried and this time I could not get a ppt with zinc ions but got a ppt with Fe2+ ions. Why did they get precipitated their
solubility product is almost of same order of other ions of group 4DraconicAcid - 10-3-2018 at 20:37
Because zinc forms a complex ion with ammonia, and iron doesn't.Akhil jain - 10-3-2018 at 23:47
