November 14, 2024, 06:05:59 PM
Forum Rules: Read This Before Posting


Topic: problem with chloride determination  (Read 3331 times)

0 Members and 1 Guest are viewing this topic.

Offline aeacfm

  • Full Member
  • ****
  • Posts: 226
  • Mole Snacks: +7/-2
  • Gender: Male
problem with chloride determination
« on: June 22, 2010, 08:44:02 AM »
when i was carrying out chloride titration when i add the chromate indicator the color appeared is not yellow as what it must appear but yellow closer to orange so when i add the AgNO3 reagent the end point like ghost so i cant detect it clearly !!!!!
do any body know what is that (what is the source of that error , how can i avoid it ?

Offline Woofuls

  • Regular Member
  • ***
  • Posts: 23
  • Mole Snacks: +4/-1
Re: problem with chloride determination
« Reply #1 on: June 24, 2010, 09:03:26 PM »
Are you using chromate or dichromate? If it is orange, try adding a small amount of sodium hydroxide to see if it goes yellow.

Offline brain

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-0
Re: problem with chloride determination
« Reply #2 on: June 29, 2010, 04:05:47 PM »
when i was carrying out chloride titration when i add the chromate indicator the color appeared is not yellow as what it must appear but yellow closer to orange so when i add the AgNO3 reagent the end point like ghost so i cant detect it clearly !!!!!
do any body know what is that (what is the source of that error , how can i avoid it ?

hi try to prepare a fresh indicator
your indicator expired

Sponsored Links