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: B-o}-20oaw, INop== —, ORGANIC QUALITATIVE ANALYSIS |, = a, (Salt No. 1), pessesitine: : nyse One basic (cation) and eG ae shan, 2 Test tubes, test ttibe han one acidic (anion) radical from given inorganic salt., , [Al Preliminary tests:, , Ne ct, 1. [Nature, , , , , Spatula, glass rod, watch glass, beaker, burner, etc., , , , , , , , , , 2. | Color of salt, , , , Observation Inference, Caystalline cY,6y> 5, Nog, 25° ete may be, present, xX Pb2*, AIS* Miner, White ., ' NH Matt, Zn?t, , moy bearesent, , , , 3. | Solubility, , , , Soluble In water, , ce stalling salt |, , press nt «, , , , [B] Dry tests for basic radicals (Cations) :, , , , , , , , , , , , hold moist turmeric paper near, the mouth of test tube., , L, , \ @ 2, TUN q mors, , , , 6 paper, , , , , , -husrn, , neddish broton, , ', , No. Test Observations Inference, 1. |Heating in a dry test tube: 1, Take a small quantity of salt in ls’ @@a™, a clean, dry test tube and heat }, it strongly. Observe the color of . n*t ma y De, the residue and gas evolved. ColouslessS qaswi hy, d, gmel\ oF NH oe, 2. |Test for NHj:, Salt + NaOH, heat gently, Smell oF Noa 4as,, Na cnau 2, , , , , , 3. [Charcoal cavity test: ;, Take the salt and solid Na,CO, in, , the ratio 1:2 on watch glass., Add few drops of gents eS, , is in, prepare a paste, place this in, charcoal cavity and heat it with, a blow pipe ina reducing flame., , wl hi te, thew Uustatl ONS, , , , , , , , , , , , , , , , , , , , , , , , (39)
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Cobalt Nitrate Test:, , If white infusible residue is, obtained in charcoal cavity test,, add two drops of cobalt nitrate, solution on the white residue, and heat in the blue flame., , , , Flame te:, Clean a platinum wire with conc., HCI. Moisten a small quantity of, the substance with concentrated, HCl on watch glass. Dip the, cleaned platinum wire in it and, heat it in oxidizing flame, (non-luminous) and observe the, colour of the flame., , , , Borax bead test:, , [For coloured salt only], , Make a small loop at the end of a, clean platinum wire, heat it strongly, and dip it in borax powder. Heat it, again till a glossy bead is obtained., Now touch the hot bead with a, small crystal of the salt and heat, , it again in oxidizing(blue) flame., Observe the colour of the bead., , , , , , , , Dry tests for acidic radicals (Anions):, , , , Test, , Observation, , Inference, , , , Action of dil HCI:, Salt + dil HCl., , , , Action of conc. H,SO,:, Salt + conc. H,SO, + heat, , Colourless qas,, giving white dense., Furnes wat th glass, vod tn NHyoy
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| (Rae Proc BOSE er, , , , , , Action of MnO, and conc. H.SO :, at, , Salt + a pinch of MnO., , + conc. H,SO, and heat Colourless gas, , tu Hing motss, blu litmus popes, xed OYhen ble aches, , , , , , Cu-foil test: (/f brown gas i, obtained in the above test then, only perform this test), , Salt + Cu-foil + conc. H,SO., and heat strongly “, , , , , , , , CV ray be, pe esent:, , , , , , 50 mL beaker. This is called original solution (O.S.), [E] Wet test for basic radical (cations):, , DETECTION OF GROUPS, , (Note: /f the anion is not detected in above dy test, then salt may contain 0% er PO; /, [D] Preparation of solution (Original Solution): Dissolve about 0.5 gm of salt in 20 mL of water ina, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Ne: i Observations, 1. | O.S. + dil. HCl, No ppt Geoup, 2. | OS. + dil. HCl + H,S gas /H,S, water solution No ppt GS, 3. | O.S. +NH,CI + NH,OH till alkaline No ept, 4. | 0.5. + NH,Cl +NH,OH till alkaline, + HS gas / H,S water solution No ppr, 5. | O.S. + NH,Cl + NH,OH till alkaline, + saturated solution of (NH,),CO;, . No ppt, 6. | OS. +NH,CI + NH,OH till alkaline, + Na,HPO, solution. No ppt, 7. | fall the above groups are absent \, Hence
