Preparation of Ammonium Hexachloroplumbate

Preparation of Lead Tetrachloride. Thoroughly mix 1 g of ammonium hexachloroplumbate with 3 g of concentrated sulphuric acid cooled to 0 °C. Separate the heavy drops of oily liquid formed from the reaction mixture. What are these oily drops Write the equations of the reactions. 

Cool the reaction mixture in the flask to 0 °C. Disconnect mixer 3 

To produce an additional amount of the lead tetraacetate, again transfer the mother liquor into flask 1 and pass a stream of dry chlorine through it, heating the solution to 80 °C with thorough stirring. Pass the chlorine through the flask until lead chloride crystals stop separating. 

Separate the precipitate using a funnel for hot filtration. Cool the filtrate to 0 °C. Separate the crystals formed as described above and combine them with the first portion. 

Write the electron configurations of the arsenic subgroup elements. Find the values of the standard electrode potentials of these elements. In what acids and under what conditions do they dissolve  

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