Hydroiodic acid test

Preparation of Hydroiodic Acid. Perform the experiment in a fume cupboardl) Assemble an apparatus as shown in Fig. 56. Put 2 g of iodine and 0.5 g of red phosphorus into test tube 1. Pour 3-5 ml of water into test tube 4. The opening of the offtake tube must be as close as possible to the surface of the water in the receiver. Why must it not be submerged into the water ... 

Properties of Hydroiodic Acid. 1. Test the obtained hydroiodic acid solution with litmus. Study its relation to metals (zinc, magnesium). 

Pour a hydroiodic acid solution into three test tubes. Add solutions of sodium acetate and lead acetate to the first tube, of silver nitrate (one or two drops) to the second one, and put a small piece of marble into the third tube. Write the equations of the reactions for all the processes occurring in the given experiment. 

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