one question

[XPFMember]

Assalamoalaikum wa rehmatullah i wa barakatuhu,
can somebody pls ans. this question,i dont know it and my teacher once gave it in a worksheet!
"From a mixture of bauxite,iron(III)oxide and germanium(IV)oxide..how can u seperate iron(III)oxide???

 

[mushairif]

I am really not sure. But i guess that when this mixture is dissolved in water, only iron(III) oxide will form a red precipitate. The red precipitate can then be decanted off .
N.B ( Not sure )

 

[waleedsmz]

I know! Add sodium hydroxide...
Bauxite is amphoteric Al2O3, so it dissolves
Germanium oxide is a non metal oxide ( acidic ) , so it dissolves too
Iron oxide is basic, so nothing happens

 

[Ahmed-Azurus]

waleed is right
add any Alkai and the above happens

 

[XPFMember]

oh thanks,avtually i was mistaken that germanium(IV)oxide is neutral which is actually acidic and it is germanium(II)oxide which is neutral :shock:
nyways JazakAllah Khairan to all!

 

[SuperXDE]

oh thanks,avtually i was mistaken that germanium(IV)oxide is neutral which is actually acidic and it is germanium(II)oxide which is neutral :shock:
nyways JazakAllah Khairan to all!

Ah... what will the answer be?

 

[XPFMember]

I know! Add sodium hydroxide...
Bauxite is amphoteric Al2O3, so it dissolves
Germanium oxide is a non metal oxide ( acidic ) , so it dissolves too
Iron oxide is basic, so nothing happens

this is the correct ans. ,they dissolve coz they react!

 

[SuperXDE]

I know! Add sodium hydroxide...
Bauxite is amphoteric Al2O3, so it dissolves
Germanium oxide is a non metal oxide ( acidic ) , so it dissolves too
Iron oxide is basic, so nothing happens

this is the correct ans. ,they dissolve coz they react!

So Germanium (IV) oxide is Amphoteric?!

 

[XPFMember]

no it is acidic so it can react with NaOH!

 

[SuperXDE]

no it is acidic so it can react with NaOH!

Ah , I misunderstood your post , Acidic not Neutral :geek:

 

[XPFMember]

germanium (IV)oxide is acidic while Germanium(II)oxide is neutral
likewise Co2 acidic and CO neutral!