Page 88 - PC 101 Interactive practical book

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

Determination of HCl & CH 3COOH 0.1 N NaOH Using M.O  from Red to Orange HCl only ≡ Using ph.ph from Colorless to first pink persistent for 30 sec. E.P 2(ph.ph.) ≡ HCl + CH3COOH E.P 1≡ HCl only (E.P 2- E.P 1) ≡ CH3COOH only

E.P 1 (M.O.)

Determination of NH 4Cl & HCl 0.1 N NaOH Using M.O  from Red to Orange y HCl onl ≡ Using ph.ph from Colorless to first pink persistent for 30 sec. E.P 2(ph.ph.) ≡ HCl + NH4Cl E.P 1≡ HCl only (E.P 2- E.P 1) ≡ NH 4Cl only

E.P 1 (M.O.)

Determination of Na 2CO 3 & NaHCO 3 0.2 N HCl Using ph.ph  from pink to Colorless E.P 1 (ph.ph.) ≡ 1/2 CO 3 2- Using M.O  from Yellow to Orange E.P 2 (M.O.) ≡ CO 3 2- + HCO 3 - 2E.P 1 ≡ CO 3 2-  (E.P 2 - 2E.P 1) ≡ HCO 3 -

Determination of NaOH & Na 2CO 3 mixture 0.2 N HCl Using ph.ph  from pink to Colorless E.P 1 (ph.ph.) ≡ OH - + 1/2 CO 3 2- Using M.O  from Yellow to Orange E.P 2 (M.O.) ≡ OH - + CO 3 2- 2(E.P 2 - E.P 1) ≡ CO 3 2- [E.P 2 - 2(E.P 2 - E.P 1)] ≡ OH -

Standard solution E.P color change Note 

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