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Unformatted text preview: water.-Add a drop of 6M HAc and 2 or 3 drops of sodium cobaltinitrate reagent.-If it is precipitated, K + must be present. • Anions Tests: 1) Cl- Test: Add silver nitrate to a solution of the unknown then dilute it with HONO 2.-White precipitation should be observed. 2) SO 4 2- Test: Add couple of drops of 0.25M Ba(NO 3 ) 2 to the solution then dilute with HONO 2.-White precipitation should be observed. 3) NO 3- Test: Place a single small crystal of Fe(OH 2 ) 6 (NH 4 ) 2 (SO 4 ) 2 in a spot plate.-Cover the crystal with test solution - immediately add 2 drops of 18M H 2 SO 4 -Watch for brown solution around the crystal....
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- Spring '08
- pH, Sodium hydroxide