. Essentials of medical and clinical chemistry. With laboratory exercises . Potassium Carbonate.—K2C03.—Obtained as an impure solu-tion (lye) by lixiviating the ashes of plants, especially foresttrees. This, evaporated to dryness, forms concentrated lye orpotash. This in turn when purified forms pearl-ash, which Fig. 39. Kf C(k

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