noel

limonene is the best smelling chemical i can find in my lab

saturated CO2 will escape from the coke solution while going down your throat

hence u need not worry about exploding stomach

Keep in mind that tin does not dissolve in hydrochlorid acid at any appreciable rate. A mix of tin and lead probably also does not dissolve easily. PbCl2 is quite insoluble and tin does not react at all with HCl.

 

I tried personally dissolving tin and it is really slow

 

The following may be interesting info: Google groups -- thread on tin

 

Testing whether a piece of metal is lead or tin is easy. Dissolve in conc. HNO3 and then dilute 10 to 20 times. If there is tin in the liquid' date=' then a white precipitate is formed of SnO2. Add a solution of KI to the diluted liquid (whether this contains white precipitate or not does not matter for the test on lead). If there is lead in the liquid, then a beautiful bright yellow precipitate is formed of PbI2. So, in one go you can detect the presence of tin and the presence of lead.[/quote']

 

 

Hi there

I would like to add that aqua regia is the way to go digesting a solder metal

3 parts HCl and 1 part HNO3

warm gently for around an hour

thanks guys

Hi guys,

As we all know, in the Volhard's test, nitrobenzene and nitric acid are added.

the purpose for nitrobenzene is to coagulate the precipitate.

Anybody knows the mechanism behind it? And also, what the reason for adding nitric acid?

Hi guys,

As we all know most aqua regia are made from 3 parts HCl and 1 part HNO3.

Any ideas what happens when we change the composition around to like

1 part HCl to 1 part HNO3

or

1 part HCL to 3 parts HNO3?

For what I know the purpose is to make the strong oxidising OCl-

My primary guess will be that a less potent aqua regia will result from the change in composition (lesser Cl- ions)

Any comments? Please correct me if I'm wrong , thanks