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Grade 12Inorganic Chemistry

why a paper ball {carbon} is added [in the analysis of nitrate cation ]to a boiling solution of salt {containing nitrate }and conc.H2SO4

Profile image of KAVYA S RAJ
9 Years agoGrade 12
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1 Answer

Profile image of Ramko
ApprovedApproved Tutor Answer9 Years ago
Paper, being derived from living matter contains Carbon in it. Carbon reduces Nitrogen in Nitrate(+5 oxidation state) to Nitrogen Dioxide ( +4 O.S). Hence the characteristics brown fumes of Nitrogen dioxide are produced and it helps in Identification of NO3- ANION.

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