Basic Radicals Practical General Chemistry PDF

Section 6 ‫المعهد التكنولوجي العالي للعلوم‬ ‫الصحية التطبيقية ببني سويف‬ Basic Radicals Practical General Chemistry “Qualitive Analysis” Prepared by/Nora M. Elbadieney Assot. Le...

Section 6 ‫المعهد التكنولوجي العالي للعلوم‬ ‫الصحية التطبيقية ببني سويف‬ Basic Radicals Practical General Chemistry “Qualitive Analysis” Prepared by/Nora M. Elbadieney Assot. Lect. at High institue of applied heath science (HIS) Supervisor: Prof.Dr/ Hanafy M Abd El-Salam  Identification of Basic Radicals (Cations) Group reagent: NH4Cl + NH4OH Basic Radical Preliminary Test (Main Test) Confirmatory Test (G3) Al +3 Exp: Salt Solution of Aluminum Sulphate Exp: Salt Solution of Aluminum Sulphate Al2(SO4)3 Aluminum Al2(SO4)3 + NH4Cl (excess) + NH4OH +NaOH Al2(SO4)3 + NH4Cl (excess) + NH4OH Al2(SO4)3 + NaOH = NaAl(OH)3 = Al(OH)3 Observation: Formation of a White ppt of Aluminum Observation: White glutinous ppt of hydroxide Al(OH)3 Aluminum Hydroxide (Al(OH)3 ) Add excess of NaOH ------ colorless Sodium #The basic radical may be Aluminum Aluminate (NaAlO2) is formed (Al +3) #The basic radical is Aluminum (Al +3) Basic Preliminary Test (Main Test) Confirmatory Test Radical (G4) Fe +2 Exp: Salt Solution of Ferrous Sulphate Exp: Salt Solution of Ferrous Sulphate + Potassium Ferrous (FeSO4)+ NH4Cl (excess) + NH4OH Permanganate (KMno4) (Pale green) FeSO4 + NH4Cl(excess) +NH4OH = Fe(OH)2 10FeSO4 + 2KMno4 + 8H2SO4 conc. = 2Fe2(SO4)3 + Observation: dirty green ppt of Ferrous K2So4 + 2MnSO4 + 8H2O Hydroxide (Fe(OH)2) Observation: Decolonization of Potassium Permanganate #The basic radical may be ferrous (Fe +2) (KMno4) #The basic radical may be ferrous (Fe +2) Exp: Salt Solution of Ferric Chloride (FeCl3) + Exp: Salt Solution of Ferric Chloride (FeCl3) + Sodium Fe +3 NH4Cl (excess) + NH4OH Phosphate (Na2PO4) Ferric FeCl3 + NH4Cl(excess) +NH4OH = Fe(OH)3 FeCl3 + Na2PO4 = FePO4 (ppt) Observation: Radish Brown Gelatinous ppt of Observation: Formation of Yellowish White ppt Ferric Ferric Hydroxide (Fe(OH)3) Phosphate (FePO4) #The basic radical may be ferric (Fe +3) #The basic radical is ferric (Fe +3) Thank you