Kno sentence example
- The tests for a salt, potassium nitrate, for example, are the tests not for KNO 3, but for its ions K and NO 3, and in cases of double decomposition it is always these ions that are exchanged for those of other substances.
- Dilute mineral acids decompose it with the formation of insoluble silver cyanide and hydrocyanic acid: KNC AgNC+HN03=HCN+ KNO 3 +AgNC. A boiling solution of potassium chloride with the double cyanide gives silver chloride and potassium cyanide.
- The potassium salt may be prepared by adding potassium cyanide to ferrous sulphate solution, the brown precipitate so formed being then heated with potassium nitrite: 5 KNC + 2 FeSO 4 = 2 K 2 SO 4 + KFe2(NC)5, 2 KFe 2 (NC) 5 + 2 KNO 2 = 2 FeO + 2 K2Fe(NC)5 NO.
- The principle ingredient of black gunpowder is KNO 3, which is, in itself, a salt.