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analytical chemistry
1.
2 - : Precipitation Titration : AgNO3 +
NaCl → AgCl ↓ + NaNO3 2AgNO3 + K2CrO4 → Ag2CrO4↓ + 2KNO3 . I- ,Br- ,Cl- SCN- BrO3 - IO3 - : .
2.
: - Mohr Method Cl- : AgNO3
+ Cl- → AgCl↓ + NO3 - K2CrO4 Ag2CrO4 : 2AgNO3 + K2CrO4 → Ag2CrO4↓ + 2KNO3
3.
PH (6.5-10) PH Ag2Cr2O7 Ag2CrO4 : 2H+ + 2CrO4 -2 ↔ 2HCrO- ↔
Cr2O7 -2 + H2O Ag+ . Ag+ + 2OH- ↔ 2AgOH ↔ Ag2O↓ + H2O
4.
- ) ( : Volhard Method )
( AgNO3 Cl- KSCN AgSCN Fe+3 Fe(SCN)6 -3 :
5.
1- AgNO3 +
Cl- → AgCl↓ + NO3 - + AgNO3 ( 1 ) 2- AgNO3 + KSCN → AgSCN↓ + KNO3 ( 2 ) 3- 6 KSCN + Fe+3 → Fe(SCN)6 -3 + 6 K+ ) ( 6N HNO3 : 1 - Fe+3 : Fe+3 + 3OH- → Fe(OH)3↓ ) (
6.
2 - CO3 -2 C2O4 -2 . AgCl AgSCN AgNO3 KSCN AgCl SCN- AgCl AgSCN : 1 - AgCl . 2 - .
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