Hydrogen Compounds of the Halogens

Reaction of Sodium Chloride, Sodium Bromide, and Potassium Iodide with Concentrated Sulphuric Acid. Put three test tubes on a stand. Put a little sodium chloride in the first of them, sodium bromide in the second, and potassium iodide in the third. Pour several drops of concentrated sulphuric acid into each tube handle the acid with a pipette or tube having a rubber bulb ). What do you observe What impurities do hydrogen bromide and iodide prepared in this way contain Write the equations of the reactions. 

Which of the hydrogen halides is the strongest reducing agent Which hydrogen halides can be prepared by the action of concentrated sulphnric acid on the relevant halide  

Reaction of Sodium Bromide and Potassium Iodide with Concentrated Orthophosphoric Acid. Put a small amount of sodium bromide in one test tube and of potassium iodide into another one. Add a 60 % orthophosphoric acid solution to both tubes. What gases evolve from the test tubes Write the equations of the reactions and explain their course. 

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General methods of preparation. There are two general methods which, with appropriate modifications, may be used to produce the hydrogen compounds of the halogens. 

Other methods of preparation. For each of the hydrogen compounds of the halogens there are certain specific methods that may be used to advantage in the laboratory Thus, hydrogen fluoride may be produced by heating potassium hydrogen fluoride ... 

Among the most useful compounds of the halogens are the hydrogen halides. Hydrogen iodide is not very stable, and it cannot be efficiently prepared by direct combination of the elements. Rather, as is... 

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