Page 34 - PC 101 practical notes 24-25..

MANSOURA NATIONAL UNIVERSIY
PHARM D- CLINICAL PHARMACY LEVEL I PHARM. ANAL. CHEM. I (PC 101)

For NH 4Cl :

⎯→
4 NH 4Cl + 6 HCHO  (CH 2) 6N 4 + 4 HCl + 6 H 20

⎯
4 HCl + 4 NaOH ⎯→ 4 NaCl + 4 H 2O

 4 NH 4Cl ≡ 4 HCl ≡ 4 NaOH

 1 NaOH ≡ 1 NH 4Cl
standard sample

# Note that formalin (HCHO) is not standard

Equivalence factor (F):

1 x M.W. of NH 4Cl x 0.1
each ml of 0.1 N NaOH ≡ ≡ .......... g NH 4Cl
1 x 1000

Concentration:

(E.P total - E.P HCl) x F x 1000
Concn. of NH 4Cl = = .......... g/L
10

Results:

E.P HCl =

E.P total =

Concn. of HCl =

Concn. of NH 4Cl =

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