Mercuric chloride and potassic ferrocyanide failed to produce this effect.
potassic bromide should be kept in the house, to use in case of necessity.
Uses in the Arts, &c.—Both sodic and potassic nitrates are called “nitre” by the public indiscriminately.
A potassic fertilizer increased the yield of nitrogen one-third.
A solution of cuprous chloride which has absorbed CO gives it up on being treated with potassic bichromate and acid.
It is also formed when metallic osmium is heated with potassic nitrate, or roasted in air.
potassic permanganate and sulphuric acid is the most delicate, and will detect 0·001 mgrm.
Selenic acid may be obtained in solution by deflagrating selenium or a selenite with potassic nitrate.
If the heat is continued, this also is decomposed, and the final result is potassic chloride.
This may be procured by heating any of the preceding oxides with potassic nitrate.