Sciencemadness Discussion Board
Not logged in [Login - Register]
Go To Bottom

Printable Version  
Author: Subject: Practical chemistry and common ion effect
Akhil jain
Hazard to Self
**




Posts: 83
Registered: 19-2-2018
Member Is Offline

Mood: No Mood

[*] posted on 8-3-2018 at 05:20
Practical chemistry and common ion effect


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

New Doc 2018-03-08(1)_1.jpg - 480kB New Doc 2018-03-08(1)_2.jpg - 322kB




Subscribe to my youtube channel named akhil the chemist. search it and you will get it this channel is unique .
https://www.youtube.com/channel/UC9GD00yhAoKajgjRWvqyH-w
View user's profile View All Posts By User
Metacelsus
International Hazard
*****




Posts: 2013
Registered: 26-12-2012
Location: Minneapolis, Minnesota, USA
Member Is Offline

Mood: Double, double, toil and trouble

[*] posted on 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.



As below, so above.
View user's profile View All Posts By User
Akhil jain
Hazard to Self
**




Posts: 83
Registered: 19-2-2018
Member Is Offline

Mood: No Mood

[*] posted on 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




Subscribe to my youtube channel named akhil the chemist. search it and you will get it this channel is unique .
https://www.youtube.com/channel/UC9GD00yhAoKajgjRWvqyH-w
View user's profile View All Posts By User
Akhil jain
Hazard to Self
**




Posts: 83
Registered: 19-2-2018
Member Is Offline

Mood: No Mood

[*] posted on 9-3-2018 at 11:55


Plz try the experiment and tell me did the same happened with you



Subscribe to my youtube channel named akhil the chemist. search it and you will get it this channel is unique .
https://www.youtube.com/channel/UC9GD00yhAoKajgjRWvqyH-w
View user's profile View All Posts By User
DraconicAcid
International Hazard
*****




Posts: 2500
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Offline

Mood: Semi-victorious.

[*] posted on 9-3-2018 at 12:28


You need to add more ammonium chloride if you want to see the common ion effect in action.



Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
View user's profile View All Posts By User
Akhil jain
Hazard to Self
**




Posts: 83
Registered: 19-2-2018
Member Is Offline

Mood: No Mood

[*] posted on 10-3-2018 at 12:09


Have you tried



Subscribe to my youtube channel named akhil the chemist. search it and you will get it this channel is unique .
https://www.youtube.com/channel/UC9GD00yhAoKajgjRWvqyH-w
View user's profile View All Posts By User
Akhil jain
Hazard to Self
**




Posts: 83
Registered: 19-2-2018
Member Is Offline

Mood: No Mood

[*] posted on 10-3-2018 at 13:29


Quote: Originally posted by DraconicAcid  
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 4




Subscribe to my youtube channel named akhil the chemist. search it and you will get it this channel is unique .
https://www.youtube.com/channel/UC9GD00yhAoKajgjRWvqyH-w
View user's profile View All Posts By User
DraconicAcid
International Hazard
*****




Posts: 2500
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Offline

Mood: Semi-victorious.

[*] posted on 10-3-2018 at 20:37


Because zinc forms a complex ion with ammonia, and iron doesn't.



Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
View user's profile View All Posts By User
Akhil jain
Hazard to Self
**




Posts: 83
Registered: 19-2-2018
Member Is Offline

Mood: No Mood

[*] posted on 10-3-2018 at 23:47


Then what about common ion effect




Subscribe to my youtube channel named akhil the chemist. search it and you will get it this channel is unique .
https://www.youtube.com/channel/UC9GD00yhAoKajgjRWvqyH-w
View user's profile View All Posts By User

  Go To Top