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Home › Miscellaneous Chemicals › Hydrate of Potassa (This is until the liquid)
Hydrate of Potassa (This is until the liquid)
This is until the liquid assumes a greenish color, and ✓ also known under the name of caustic potash. add gradually 24 troy ounces pure carbonate' Liquor of potassa, 1 gallon; evaporate in a of potassa (previously dissolved in 14 pints clean iron vessel over the fire until the ebulli- distilled water), until it ceases to produce a tion being finished, the hydrate of potassa precipitate; continue the heat for 30 minutes, liquefies; pour this into proper moulds. A then filter. Wash the precipitate with 1 pint pale greyish or bluish solid, very soluble in boiling distilled water, and filter. Mix the water and alcohol. It should be totally filtered liquids, and crystallize by evaporation. soluble in alcohol. Its solution should be scarcely affected by the nitrates of baryta and silver. It is chiefly used as a caustic, and in chemistry. (Cooley.) Dry the crystals on bibulous paper and keep them in a well-stoppered bottle. (U. S. Ph.)