Sulfuric Acid Problem

[slick14]

I know this is not the best was to do it but you can drop a few ml. of 31.5% muratic acid into your toluene/oil soln. and shake it up (dont forget to vent)  and a red oil will fall to the bottom of the sep. funnel, then put the oil into an evap. dish and allow it to get almost dry, then pour acetone over it and put it in the freezer for a while this will allow the crystals to form. the longer you leave this in the freezer he more dense the crystals will be.  One time I left the mix in the freezer for a week and they came out looking like diamonds.  Good Luck Slick

[heavenadisaster]

rhodium, in your protocol on your site, what is the reason for dissolving the evolved gas into IPA, and how do you get it out of the solution again?

also, would it be possible to make conc HCl(aq) by gassing dh20 for a while?

[gabd]

It might be interesting to you. Some people like do gas that way, I know I dont but it might be useful to you
Here is the post

Post 265010

(VideoEditor: "New Clean Gassing Method!", Newbee Forum)

Peace

[lugh]

From Inorganic Laboratory Preparations  

A one-liter bottle is fitted with a 3-hole stopper through which the following pieces of apparatus are connected
1. A combustion tube about 10cm long carrying an air­inlet tube with a screw clamp and a gas-outlet tube bent at a right angle which leads down into the middle of the large bottle. A charge of 10g of pow­dered pyrites is placed in the combustion tube; a small plug of glass wool near the exit end retains any solid particles or unburnt sulfur.
2. A 25-m1 distilling flask with a long side-arm bent at an angle and leading just below the stopper in the bottle. The flask is fitted with a capillary tube (not drawn out too fine) which leads almost to the bot­tom of the vessel ; 10ml of concentrated nitric acid are introduced into the flask.
3. A filter flask is half filled with water as a gas flow indicator and fitted with a glass tube, one end of which leads just under the water surface in the flask and the other end made flush with the bottom of the stopper in the large bottle. The side arm of the flask leads to the water pump.
With the screw clamp open, the pyrites is gently heated with a wing burner in a slow stream of air drawn in by the aspirator. The clamp is then partially closed so that air also passes through the capillary into the nitric acid. The pyrites may now be heated more strongly ; the current of air through the nitric acid is adjusted by means of the clamp so that red fumes of nitrogen oxides are always pres­ent in the bottle or "chamber." If not enough vapor of nitric acid is provided, colorless crystals of nitrosyl sulfuric acid ("chamber crystals") will form on the walls of the bottle.
When the pyrites is completely burned, the apparatus is disconnected and any oxides of nitrogen remaining in the bottle are carried away by a stream of air. The contents of the bottle are taken up with 75m1 of water; if the solu­tign is colored yellow-brown from dissolved nitrogen oxides, they should be removed by a current of air. The solution of sulfuric acid is made up to 100m1 in a volumetric flask and the yield is determined by titration of an aliquot with base.

[Richy]

[lugh]

Sulfur dioxide has been synthesized from sulfur and sulfuric acid, in

Traite de chimie appliquee aux arts, Paris 1 149 (1828)

Comptes Rendus 76 92 (1873)

Dingler's Polytechnisches Journal 150 379 (1858)