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Author Topic: Does gold react with sulphuric acid?  (Read 25125 times)

Offline lightarrow

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Does gold react with sulphuric acid?
« Reply #25 on: 16/04/2009 13:09:43 »
Do you have to keep the temperature of the solution low?
Don't think so.
 

Offline Chemistry4me

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Does gold react with sulphuric acid?
« Reply #26 on: 16/04/2009 13:19:01 »
Higher temperature favors the dinitration product when adding nitro groups onto an aromatic ring right? Or is that just my memory playing games?
 

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Does gold react with sulphuric acid?
« Reply #27 on: 16/04/2009 15:15:26 »
Higher temperature favors the dinitration product when adding nitro groups onto an aromatic ring right? Or is that just my memory playing games?
This is a different question.
Yes, higher T favors the nitrations but sometimes these reactions are auto-catalityc or the products can decompose in presence of the reagents, so you have to keep the T low enough if you don't want to go to hospital...
 

Offline Chemistry4me

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Does gold react with sulphuric acid?
« Reply #28 on: 17/04/2009 02:55:17 »
Okay, got that. Thanks. :)
 

Offline Dr.IC

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Does gold react with sulphuric acid?
« Reply #29 on: 17/04/2009 09:50:30 »
What happens when this solution is heated?
NO2+ + HSO4- + H2O
 

Offline Chemistry4me

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Does gold react with sulphuric acid?
« Reply #30 on: 17/04/2009 09:56:13 »
What do you want to do?
 

Offline Dr.IC

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Does gold react with sulphuric acid?
« Reply #31 on: 17/04/2009 10:41:11 »
I am mixing HNO3 and H2SO4 in the ration of 4:1, and heating it to drop on IC to make the die visible (for etching plastic).
 

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Does gold react with sulphuric acid?
« Reply #32 on: 17/04/2009 14:53:15 »
I am mixing HNO3 and H2SO4 in the ration of 4:1, and heating it to drop on IC to make the die visible (for etching plastic).
1.Why 4:1?
2.The HNO3 is more than 98%?
3.You use that mix to dissolve plastic or what, exactly?
 

Offline Dr.IC

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Does gold react with sulphuric acid?
« Reply #33 on: 21/04/2009 04:38:43 »
This is to etch epoxy or plastic any of this...
 

Offline Chemistry4me

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Does gold react with sulphuric acid?
« Reply #34 on: 21/04/2009 04:39:59 »
Ah, finally. The answer. And some sanity too. :)
 

Offline Dr.IC

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Does gold react with sulphuric acid?
« Reply #35 on: 21/04/2009 04:49:41 »
I am mixing HNO3 and H2SO4 in the ration of 4:1, and heating it to drop on IC to make the die visible (for etching plastic).
1.Why 4:1?
2.The HNO3 is more than 98%?
3.You use that mix to dissolve plastic or what, exactly?

I dont know y v r using 4:1, and The HNO3 is 98%
 

Offline Chemistry4me

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Does gold react with sulphuric acid?
« Reply #36 on: 21/04/2009 04:52:33 »
I dont know y v r using 4:1
Eh? Is your keyboard broken?

------

Are you trying to say: I dont know why they are using 4:1?
 

Offline Dr.IC

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Does gold react with sulphuric acid?
« Reply #37 on: 21/04/2009 07:38:42 »
I dont know y v r using 4:1
Eh? Is your keyboard broken?

------

Are you trying to say: I dont know why they are using 4:1?
i was taking about our team. our team has been trained to use the above spec.
 

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Does gold react with sulphuric acid?
« Reply #37 on: 21/04/2009 07:38:42 »

 

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