PENENTUAN SECARA POTENSIOMETRIK 2-AMINOPHENOL DG ALAT TITRINO / TITROPROCESSOR

Peralatan
Potentiometer = 751 GPD Titrino / Titroprocessor
Electrodes = 6.0431.100 Pt Titrode; input 1

Pereaksi
c(NaNO₂) = 0.2 mol/L; D0

Sample
app. 0.3 ... 0.35 g sample (2-aminophenol)
10 mL w(HBr) = 0.20 (20%)
30 mL dist. Water

Remarks
Determination reaction:

H+

R-NH₂ + HNO₂ + HBr →[R-NN+]Br- + 2 H₂O

Perhitungan:

Content=EP1*C01*C02*C03/C00;2;%

Content = content of 2-aminophenol in %
C01 = molecular mass of 2-aminophenol (109.13 g/mol)
C02 = factor for conversion mL to L, and for % (0.001*100=0.1)
C03 = concentration of titrating agent (0.2 mol/L)
Enter the appropriate molecular mass for other amines (C01).
Instead of the Pt Titrode the 6.0420.100 combined Pt electrode can be used.

. Answer

Content = 14.396 x 109.13 x 0.1 x 0.2 / 0.3188 = 98.56 %

EP1 = 14.396 mL
C00 = 0.3188 g

Literature

Metrohm Application Bulletin No. 228: Diazotisation titrations