Elements of Chemistry Including the History of the Imponderables And the Inorg
Elements of Chemistry Including the History of the Imponderables And the Inorg
Turner, Edward
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2MgO. Ammonia . . . 34-3 2 eq. 2H 9 N. Water ... 90 10 eq. 10HO. The mode in which these elements are arranged is unknown. When heated to redness it loses its water and ammonia, and the residue is diphosphate of magnesia, which contains 36-67 per cent, of pure magnesia. At a strong red heat it fuses, and appears when cold as a white enamel. When the materials for forming the preceding salt are mixed while hot, small acicular crystals subside on cooling, which are said by Berzelius to contain le...ss of the two bases than the other salt. Phosphates of Protoxide of Lead. The triphosphate is precipitated when ace- tate of oxide of lead is mixed with a solution of the rhombic phosphate of soda, acetic acid being set free. The triphosphate with basic water is best formed by adding the rhombic phosphate of soda gradually to a hot solution of chloride of lead. The nitrate should not be used for the purpose, as it combines with the precipitate. Both these phosphates are white, and are frequently formed at the same time.
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