Supplementary Experiments and Syntheses

Preparation of Chlorine by Reacting Oxygen with Hydrogen Chloride. Assemble an apparatus as shown in Fig. 58, pour 3-5 ml of a 96 % sulphuric acid solution into each of wash bottles 1 and 2, 

Heat the furnace to a temperature of 450-500 °C use a thermocouple ) Adjustthev te of feeding the gases into wash bottle 3 in accor- 

Why must the temperature not be raised above 600 °C Write the equation of the expected reaction. How is the change in the colour of the indigo explained  

Preparation of Purified Iodine. Dissolve 32 g of potassium iodide in 100 ml of water and 25 g of copper sulphate pentahydrate in 80 ml of water. Pour the solutions together into a 200-ml glass beaker and let the solution settle. Separate the precipitate from the 

Assemble an apparatus for distillation with steam (Fig. 59a). Transfer the aqueous solution of iodine into flask 4. Distil off the iodine. For this purpose, open the clamp on tee-piece 3 and heat the water in steam boiler 1 until it boils. Next regulate the rate of steam flow with the aid of the clamp and carefully heat flask 4. After the main part of the iodine gathers in glass tube 5, open the clamp and stop heating steam boiler 1 and flask 4. 

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The present book devotes a lot of space to the synthesis of the most important inorganic compounds and the chemistry of the elements. Since the book contains a large number of experiments and syntheses, they cannot be performed by the students during the time allotted for practical work, and the authors have divided the laboratory works of each chapter into two parts. The first describes the obligatory experiments, and the second, supplementary experiments and syntheses. 

Properties of Tin(II) Chloride. 1. Acquaint yourself with the ways of preparing tin(II) and tin(IV) chlorides (see Supplementary Experiments and Syntheses 5 and 6, p. 268). Which of these compounds should hydrolyze to a greater extent ... 

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