Experiment No. 4 Aim: To identify acidic and basic radical in the given sample of salt. Experiment 1. Preliminary examination a. Note the colour of salt b. Note the odour of salt c. Note the solubility of the salt 2. Dry heating test a. Take a pinch of salt in dry test tube and heat. b. Perform flame test . Observation Inference Black / brown No odour Soluble in water Fe3+ may pr NH4+ , CH3COO- ab Black residue or colour of salt changes brown to red /yellow, colourless gas with pungent smell Fe3+ may present Cl- may present Pb2+ ab No specific flame c. Perform charcoal cavity test No specific bead 3. Wet Test for acidic radical a. salt + dil. H2SO4 No rx in hot and cold Zn2+ Pb 2+ absent b. salt + conc. H2SO4 colourless gas with pungent smell Cl- may pr White ppt Greenish yellow gas evolved Cl- pr Clconf 4. Confirmatory test for acidic radical a. Saly solution + AgNO3 b. salt +MnO2 + conc H2SO4 + Heat c. Bring moist starch iodide paper near the mouth of test tube d. Bring rod dipped in NH4OH near the mouth of test tube 5. Confirmatory test for basic radical * Salt solution + NaOH + heat * Salt solution + Dil HCl * Salt solution + dil. HCl + Na2S * Salt solution + NH4Cl + NH4OH * dissolve the ppt in HCl and divide in 2 parts * To 1st part + KSCN nd * To 2 part+ K4[Fe(CN)6] Violet spot on paper Dense white fumes CO32- ab Cl- conf Cl- conf no smell of ammonia no white ppt no black ppt NH4+ ab Zero grp ab Pb2+ ab 1st grp absent. 2nd grp absent , Cu2+ ab brown ppt 3rd grp present +, Fe3+ present blood red Prussian blue Fe3+ confirmed Fe3+ confirmed Result : The given salt is Ferric chloride with Cl- as acidic radical and Fe3+ as basic radical Experiment :5 Aim: To identify acidic and basic radical in the given sample of salt. Experiment 1. Preliminary examination a. Note the colour of salt b. Note the odour of salt c. Note the solubility of the salt 2. Dry heating test a. Take a pinch of salt in dry test tube and heat. b. Perform flame test . c. Perform charcoal cavity test Observation Inference White No odour Soluble in water NH4+ , Zn2+ Al3+ Mg2+ may pr NH4+ , CH3COO- ab Colour of salt yellow when hot and white when cold, colourless gas with pungent smell No specific flame White incrustations Zn2+ may present Cl- may present 3. Wet Test for acidic radical a. salt + dil. H2SO4 No rx in hot and cold b. salt + conc. H2SO4 colourless gas with pungent smell 4. Confirmatory test for acidic radical a. Saly solution + AgNO3 b. Salt + MnO2 + conc H2SO4 +Heat c. Bring moist starch iodide paper near the mouth of test tube d. Bring rod dipped in NH4OH near the mouth of test tube 5. Confirmatory test for basic radical * Salt solution + NaOH + heat * Salt solution + Dil HCl * Salt solution + dil. HCl + Na2S * Salt solution + NH4Cl + NH4OH * Salt solution + NH4Cl + NH4OH+Na2S * dissolve the ppt in dil.HCl and Divide in 2 parts * To 1st part + NaOH nd * To 2 part + K4[Fe(CN)6 Pb2+ ab Zn2+ may present CO32- ab Cl- may pr White ppt Greenish yellow gas evolved Cl- pr Cl- conf Violet spot on paper Cl- conf Dense white fumes Cl- conf no smell of ammonia no white ppt no black ppt NH4+ ab Zero grp ab Pb2+ ab 1st grp absent. 2nd grp absent , Cu2+ ab no ppt 3rd grp absent Fe3+, Al3+ ab dirty white ppt white ppt sky blue ppt 4th grp pr, Zn2+ may pr Zn2+ confirmed Zn2+ confirmed Result : The given salt is Zinc chloride with Cl- as acidic radical and Zn2+ as basic radical Experiment :5 Aim: To identify acidic and basic radical in the given sample of salt. Experiment 1. Preliminary examination a. Note the colour of salt b. Note the odour of salt c. Note the solubility of the salt 2. Dry heating test a. Take a pinch of salt in dry test tube and heat. b. Perform flame test . c. Perform charcoal cavity test Observation Inference green No odour Soluble in water Ni2+ may pr NH4+ , CH3COO- ab Black residue, colourless gas with pungent smell No specific flame No bead Zn2+ may present Cl- may present 3. Wet Test for acidic radical a. salt + dil. H2SO4 No rx in hot and cold b. salt + conc. H2SO4 colourless gas with pungent smell 4. Confirmatory test for acidic radical a. Saly solution + AgNO3 b. Salt + MnO2 + conc H2SO4 +Heat c. Bring moist starch iodide paper near the mouth of test tube d. Bring rod dipped in NH4OH near the mouth of test tube 5. Confirmatory test for basic radical * Salt solution + NaOH + heat * Salt solution + Dil HCl * Salt solution + dil. HCl + Na2S * Salt solution + NH4Cl + NH4OH * Salt solution + NH4Cl + NH4OH+Na2S * dissolve the ppt in aqua regia and dimethyl glyoxime + NH4OH Pb2+ ab Zn2+ Pb 2+ ab CO32- ab Cl- may pr White ppt Greenish yellow gas evolved Cl- pr Cl- conf Violet spot on paper Cl- conf Dense white fumes Cl- conf no smell of ammonia no white ppt no black ppt NH4+ ab Zero grp ab Pb2+ ab 1st grp absent. 2nd grp absent , Cu2+ ab no ppt 3rd grp absent Fe3+, Al3+ absen black ppt 4th grp pr, Ni2+ may pr pink ppt Ni2+ conf Result : The given salt is Nickle chloride with Cl- as acidic radical and Ni2+ as basic radical Experiment :6 Aim: To identify acidic and basic radical in the given sample of salt. Experiment 1. Preliminary examination a. Note the colour of salt b. Note the odour of salt c. Note the solubility of the salt 2. Dry heating test a. Take a pinch of salt in dry test tube and heat. b. Perform flame test . c. Perform charcoal cavity test Observation Inference Rose red No odour Soluble in water Co2+ may pr NH4+ , CH3COO- ab Blue when hot and pink when cold, Brown fumes No specific flame No bead Co2+ may present 3. Wet Test for acidic radical a. salt + dil. H2SO4 No rx in hot and cold b. salt + conc. H2SO4 Brown fumes 4. Confirmatory test for acidic radical a. Salt solution + AgNO3 b. Salt solution + BaCl2 c. Salt solution + Cobalt nitrate d. salt solution + Cu turnings + conc. H2SO4 + heat e. Salt solution + Freshly prepared FeSO4 + con H2SO4 from walls of test tube 5. Confirmatory test for basic radical * Salt solution + NaOH + heat * Salt solution + Dil HCl * Salt solution + dil. HCl + Na2S * Salt solution + NH4Cl + NH4OH * Salt solution + NH4Cl + NH4OH+Na2S * dissolve the ppt in aqua regia and divide in 2 parts st * To 1 part + NH4SCN and acetone nd * To 2 part+ NaNO2+ acetic acid+ NH4OH NO3- may present Pb2+ ab Zn2+ Pb 2+ ab CO32- ab NO3- may pr No White ppt No white ppt No violet colour Cl- ab SO42- ab PO43- ab Brown fumes NO3- conf Brown ring at the junction of two liquids NO3- conf no smell of ammonia no white ppt no black ppt NH4+ ab Zero grp ab Pb2+ ab 1st grp absent. 2nd grp absent , Cu2+ ab no ppt 3rd grp absent Fe3+, Al3+ absen black ppt 4th grp pr, Co2+ may pr blue colour in alcohol layer Co2+ conf yellow ppt Co2+ conf Result : The given salt is Cobalt nitrate with NO3- as acidic radical and Co2+ as basic radical Experiment :7 Aim: To identify acidic and basic radical in the given sample of salt. Experiment 1. Preliminary examination a. Note the colour of salt b. Note the odour of salt c. Note the solubility of the salt 2. Dry heating test a. Take a pinch of salt in dry test tube and heat. b. Perform flame test with Pt wire c. Perform charcoal cavity test Observation Inference White No odour Soluble in water Zn2+ Pb2+ NH4+may pr NH4+ , CH3COO- ab White residue glows on heating Mg2+ may present Pb2+ ab No specific flame Zn2+ Pb2+absent No bead 3. Wet Test for acidic radical a. salt + dil. H2SO4 No rx in hot and cold b. salt + conc. H2SO4 No rx CO32- ab Cl- , NO3- and CH3COO- ab 4. Confirmatory test for acidic radical a. Saly solution + AgNO3 b. Salt solution + BaCl2 c. Add dil HCl or HNO3 No White ppt White ppt White ppt remains undissolved Cl- ab SO42- pr SO42- conf White ppt SO42- conf no smell of ammonia no white ppt no black ppt NH4+ ab Zero grp ab Pb2+ ab 1st grp absent. 2nd grp absent , Cu2+ ab no ppt 3rd grp absent Fe3+, Al3+ absen no ppt 4th grp ab, Zn2+ may ab no ppt 5th grp absent, Ca2+ , Ba2+ ab white ppt 6th grp present, Mg2+ present Sky blue ppt Mg2+confirmed pink ash Mg2+confirmed white ppt Mg2+confirmed d. salt solution +lead acetate + acetic acid 5. Confirmatory test for basic radical * Salt solution + NaOH + heat * Salt solution + Dil HCl * Salt solution + dil. HCl + Na2S * Salt solution + NH4Cl + NH4OH * Salt solution + NH4Cl + NH4OH+Na2S * Salt solution + NH4Cl + NH4OH + Ammonium carbonate * salt solution+ ammonium oxalate * Dissolve the ppt in equal amount of water and divide in 2 parts * To 1st part + magneson reagent + NaOH * To 2nd part + crystals of cobalt nitrate + dip a piece of filter paper and burn * salt solution+ Na2HPO4+ NH4OH Result : The given salt is Magnesium sulphate with SO42- as acidic radical and Mg2+ as basic radical
