CBSE Class 11-science Answered
Why is conc hno3 is added to sodium extract before testing for halogen
Asked by sanathoisapam1 | 14 Feb, 2018, 08:30: PM
Expert Answer
Sodium forms NaCl with Cl containing compound that gives a presipitate of AgCl after addition of AgNO3 in chloride detection process.
So to remove other radicals(CN-. S2- etc) a small amount of nitric acid is added to the extract.
To Prevent Formation of AgCN/Ag2S
Answered by Sumit Chakrapani | 15 Feb, 2018, 12:22: AM
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