Nitrate which does not give nitrate test
Dear student,
The lead nitrate would not give brown ring test because on addition of freshly prepared ferrous sulphate with lead nitrate solution, it will react with it and form a white precipitate of lead sulphate that obscure the brown ring.
The equation for the reaction with lead nitrate and ferrous sulphate is as follows.
Pb(NO3)2 + FeSO4 → Fe(NO3)2 + PbSO4
The test of nitrate can be done by the filter the precipitate formed by the lead sulphate and the test should be performed with the filtrate.
regards
The lead nitrate would not give brown ring test because on addition of freshly prepared ferrous sulphate with lead nitrate solution, it will react with it and form a white precipitate of lead sulphate that obscure the brown ring.
The equation for the reaction with lead nitrate and ferrous sulphate is as follows.
Pb(NO3)2 + FeSO4 → Fe(NO3)2 + PbSO4
The test of nitrate can be done by the filter the precipitate formed by the lead sulphate and the test should be performed with the filtrate.
regards
