Liquid bromine

This method is by far the easiest of the two methods I descnbe, but because it uses bromine liquid as a precursor to the dibromodioxane crystals a fume cupboard (or a fucking good method of fume extraction) is absolutely essential. Surgically removing ones gonads with a blunt knife would be a much less painful way of harming yourself than messing with this stuff in the kitchen. 

Bromine liquid - a very nasty red liquid with a heavy vapour that shoots out of the bottle as soon as you open it, that will make your skin and eyes sting like you ve never known. 

What s left in the water now needs to be vacuum filtered and dried. This should be done carefully and under the fume hood. Up to this point the chemistry will have taken around 30 minutes, the drying might take a day or so. Often bromine liquid stays hanging around the crystals which makes them nasty, leave in the buchner funnel of your vacuum filter overnight to get rid of all that bromine. Unless all the bromine has gone, don t go near them without a fume cupboard or a mask. 

Follow die directions for Question 7 for a salt bridge cell in which die anode is a platinum rod immersed in an aqueous solution of sodium iodide containing solid iodine crystals. The cathode is another platinum rod immersed in an aqueous solution of sodium bromide with bromine liquid. 

Br(g) from the thermodynamic data provided in Appendix 2A. (b) What is the vapor pressure of liquid bromine (c) What is the partial pressure of Br(g) above the liquid in a bottle of bromine at 25°C (d) A student wishes to add 0.0100 mol Br2 to a reaction and will do so by filling an evacuated flask with Br2 vapor from a reservoir that contains only bromine liquid in equilibrium with its vapor. The flask will be sealed and then transferred to the reaction vessel. What volume container should the student use to deliver 0.010 mol Br2(g) at 25°C ... 

Bromine liquid Unknown n Eerric chloride Unknown s... 

Bromine (dry gas) Bromine (liquid) Bromobenzene Butanol Butyl acetate Butylamine Butylchloride Butyric acid Calcium chloride Carbon tetrachloride Castor oil Cellosolve Cellosolve acetate Chlorine (dry gas) Chlorine water Chloroacetic acid Chlorobenzene Chloroform Chlorosulfonic acid Chromic acid Citric acid Colza oil Copper sulfate Cyclohexane Cyclohexanol Cyclohexanone... 

Bromine is a dense, dark red, mobile liquid that vaporizes readily at room temperature to give a red vapor that is highly corrosive to many materials and human tissues. Bromine liquid and vapor, up to about 600°C, are diatomic (Br, ). Table 1 summarizes the physical properties of bromine. 

PBr3,Br2uq.)=20 3 Cals. P. Walden examined the electric conductivity of the pentabromide dissolved in liquid sulphur dioxide or arsenic trichloride.. W. A. Plot-nikofi observed that phosphorus pentabromide dissolved in bromine conducts an electric current, depositing phosphorus on the cathode, and combines with bromine to form pentabromide. W. Finkelstein measured the decomposition potential of the pentabromide in bromine, liquid sulphur dioxide, arsenic trichloride, and nitrobenzene. 

Phosphonium Bromide, PH4Br, was made by Serullas in 1831 from the component gases by direct union.14 Its dissociation pressure reaches only 1 atmosphere slightly below +38° C.13 It can also be made by passing phosphine into the most concentrated aqueous hydro-bromic acid,15 or hydrogen bromide dissolved in phosphoryl chloride,16 or from phosphine and bromine.14 It forms colourless cubic crystals which sublime at about +30° C.17 The heat of formation of the solid from the gases PH3 and HBr is +23 Cals., while that evolved when the initial materials are bromine (liquid), hydrogen and phosphorus (solid) is +44-1 Cals.15... 

Copper(II) sulfate Chlorine gas KMn04 solution Bromine liquid... 

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