| |
| Lead is often | Black precipitate with sulphureted
| present, derived | hydrogen.
| from the action |
| upon flint glass |
| bottles |
| |
Nitric acid. | Traces of | After dilution it gives a
H, NO_{3} | sulphuric acid | precipitate with barium nitrate.
Molec. Wt. 63 | |
| Chlorides | After dilution it gives a
| | precipitate with silver nitrate.
| |
| Peroxide of nitrogen| The acid is yellow.
| |
| Iodine may be | After dilution and cooling it gives
| present if the acid | a blue color with starch, paste,
| be prepared from | or mucilage.
| sodium nitrate |
| |
Hydrochloric | Free chlorine | Liberates iodine from solution
acid, HCl | | of potassium iodide. See also
Molec.
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