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what is the chemical equation for Carious method of quantitative analysis of halogen sulphur and phosphorous

what is the chemical equation for Carious method of quantitative analysis of halogen sulphur and phosphorous

Grade:12th pass

1 Answers

PASUPULETI GURU MAHESH
126 Points
8 years ago
detection of  halogens a small portion of  sodium fusion  extract is acidified  with HNO3 and  then  treated  with  AGNO3  IF  WHITE colour  indicate  cl,  pale  yellow indicate  br,  yellow   indicate  I.
 
 THEN  CHEMICAL  EQATION  AG++X-  GIVES  AGX(SILVER HALIDE)
DETECTION  OF  SULPHUR  
small portion of  sodium fusion  extract FRESLY  PREPARED  SODIUM NITRO PURSIDE SOLUTION IS ADDED;DEEP VOILET COLOUR IS OBTAINED WHICH INDICATES THE PRESENCE OF SULPHUR
 
NA2[FE(CN)5NO]+NA2S  GIVES NA4[FE(CN)5NO.S]
NA+C+N+S GIVES NASCN(SODIUM THIO CYNATE
NASCN+FECL3 GIVES (FE(SCN))+2  (BLOOD RED COLOUR  INDICATION)
 
DETECTION OF PHOSPHOROUS
NA3PO4+3HNO3 GIVES H3PO4+3NANO3
H3PO4+12(NH4)2MOO4+21HNO3 GIVES (NH4)3PO4.12MOO3+21NH4NO3+12H2O

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