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INORGANIC QUALITATIVE ANALYSIS SYSTEMATIC ANALYSIS OF INORGANIC SALT MIXTURE Inorganic mixture analysis involves the isolation and identification of anions(acid radicals)and the cations (basic radicals). It is advised that anions are analysed first and then the cations. For the systematic analysis of anions, the usual practice is to prepare a sodium carbonate extract. About 0.5g to 1g of the mixture is boiled with 1.5g to 3g of sodium carbonate in 20ml of distilled water. When the volume reduces to two third, it is cooled and filtered. The filtrate is known as sodium carbonate extract. It contains various anions as their sodium salts and can be analyzed for anions. The residue is used for cation analysis. ANALYSIS OF ACID RADICALS Experiment | ____ Obseryation | Inference Preliminary tests 1, Colour and appearance (a)Blue or bluish green Copper present (grees Iron or copper or nickel present Manganese or Cobalt (c) Pink present \(d)No characteristic color | Absence of Cu, Fe, Ni, | Mg and Co, 2. Flame Test: (a)Bluish green May be copper The salt is made into a paste by (b)Bright green May be borate mixing with a drop of con. HCI. (c)Apple green May be barium A small amount of the paste is (d)Crimson red May be strontiom introduced into the flame using a ‘i : splinter. (e)Brick red May be calcium (f)No characteristic color Absence of Cu, Borate, fiame Ba, Sr and Ca. 3. Boron trifluoride Test: Substance is made into a paste by mixing with a pinch of CaF, and | Bright green colour Presence of borate con. H28Q4. This paste is intoduced into the flame 4. Ethyl borate Test: A little of the substance is warmed with two drops of con. H2SO, and | Green Edged flame Presence of borate few drops of ethyl alcohol, The vapours are then ignited, 5. Action of HCl . 5 Brisk effervescence and the A small amount of the salt is oe lime water milky BAS | Presence of Carbonate treated with two drops of dil-HCI 
