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INORGANIC - Coggle Diagram

- - - - Dissolution = FeCl3
        Conc. HCl-HNO3 (3:1)
        & H2SO4
        
        Filter-Separation
        Washing
        
        FeCl3 (Filtrate)
        
        Dilution (Known-100-Volume)
        
        K2Cr2O7 (O.A.)
        
        1mL 0.025 M K2Cr2O7 = 0.001396g Mn :check:
        
        Aliquot (10)
        & Conc. HCl (FeCl3) & ∆ & SnCl2 (Excess R.A.)
        & HgCl2 (Hg2Cl2 Turbidity) & Diphenylamine
        (Internal-Indicator) & H3PO4 (Fe+3 Complex)
        
        Diphenylamine
        (Internal-Indicator)
        
        112g Fe (%) = 160g Fe2O3
        
        SiO2 (Residue)
        
        Silica-Crucible-Ignition
    - - Dissolution = MnSO4
        Conc. HCl-HNO3 (3:1)
        & H2SO4
        
        Filter-Separation
        Washing
        
        MnSO4 (Filtrate)
        
        Dilution (Known-100-Volume)
        
        KMnO4 (Na2C2O4 134)
        = MnO2 (Absorb Mn(OH)2)
        
        1000 mL 1N KMmO4 = 16.48g Mn :check:
        mL N KMnO4 = (mL•N•0.000412)/N
        
        Aliquot (10)
        & ZnO-Paste (PPT of
        H-MnO2 settles quickly)
        & ∆ & HNO3 (2N)
        
        54.94g Mn (%) = 86.94g MnO2
        
        SiO2 (Residue)
        
        Silica-Crucible-Ignition
  - - - Dissolution
        Conc. HNO3 & H2O & ∆
        
        Filter-Separation
        
        Pb(NO3)2 (Filtrate)
        
        Dilution (Known-100-Volume)
        50 mL Dilute Solution = PbCrO4 g ;
        PbCrO4 (323.2 g) = Pb (207.2 g)
        
        Aliquot (50) + 4% K2Cr2O4
        + [Sodium acetate + Acetic Acid
        (Replace-HNO3) = Buffer (4.6)] +
        ∆ (Digestion)
        
        Filter-PbCrO4
        -Gooch-Crucible
        
        SnO2 (Residue)
        
        SiO2-Silica-Crucible-Ignition
        150.7 g SnO2 = 118.7 g Sn
    - - Dissolution
        Conc. HCl : HNO3 (3:1) + ∆
        
        Dilution (Known-100-Volume)
        25 mL Dilute Solution = Fe2O3 g ;
        Fe2O3 (159.7 g) = 2 Fe (111.7 g)
        
        Aliquot (25)
        + H2SO4 (Dil.) + Conc. HNO3 + ∆ +
        NH4OH + NH3(1:1) = Fe(OH)3 & Cr(OH)3
        & Wash (NaOH (2N) + H2O2) + ∆
        
        Filter-Separation
        
        Na2CrO4 (Filtrate)
        + Acetate Buffer (4.6 = Sodium
        Acetate + Acetic Acid) + 4% Pb(NO3)2 + ∆
        
        PbCrO4
        
        Fe(OH)3 (Residue)
        
        Fe(OH)3-Silica-Crucible-Ignition