Preparation of Potassium Persulphate

Preparation of Potassium Persulphate. Assemble an apparatus shown in Fig. 74. Put 100 ml of a potassium bisulphate solution saturated at 0 °C (see Appendix 1, Table 1) into test tube 1. Immerse 

Write the equation of the reaction. Indicate the substances that evolve at the electrodes. Transfer the evolved crystals onto a glass filter No. 3 (about 400 mesh), suck off the filtrate, and wash the 

Prepare 20 ml of a solution of the obtained compound saturated at room temperature. Pour 3 ml of the solution into each of three test tubes. Add to the first tube 1 ml of a 1 N sulphuric acid solution, one drop of silver nitrate, and one drop of a 1 N manganese sulphate solution. Heat the tube. Add to the second tube 1 ml of a 1 A chromium sulphate solution and 2 ml of a 1 A sodium hydroxide solution. Pour into the third tube 1 ml of a 1 A sodium hydroxide solution and 1 ml of a 1 A manganese sulphate solution. Comment on your observations. Write the equations of the reactions. 

What compounds are called peraeids What are the features of their structure  

Preparation and Properties of Selenium(lV) Oxide. Selenium compounds are very poisonous Hand in the prepared substances and residues o/ selenium preparations to the laboratory assistant. Run all experiments with selenium in a fume cupboard After work, thoroughly wash the ware and your hands. 

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