Salts And Their Reactions a Span Classsearchtermclassspan book of Pract
Salts And Their Reactions a Span Classsearchtermclassspan book of Pract
Leonard Dobbin
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Barium nitrate produces a white precipitate of barium sulphate, insoluble in dilute acids K 2 SO 4 + Ba(NO 3 ), - 2 KNO 3 + BaSO 4 . With concentrated solutions silver nitrate produces a white precipitate of silver sulphate K 2 SO 4 + 2 AgNO 3 = 2 KNO 3 + Ag 2 SO 4 . Lead acetate produces a white precipitate of lead sulphate K 2 SO 4 + PbA 2 = 2KA + PbSO 4 . Solid sulphates (and the salts of sulphur acids generally), when fused with carbon and sodium carbonate, yield sulphide, recognisable by t...he dark stain produced when the mass is placed upon a silver coin and moistened with water. PHOSPHATES. Orthophosphoric acid, H 3 PO 4 ; tribasic. Of the several acids derived from phosphoric anhydride, by far the most important is orthophosphoric acid, H 3 PO 4 ; and the reactions of its salts, the orthophosphates (usually called simply the phosphates), will alone be considered in this place. Examples of soluble phosphates : Phosphates of potassium, sodium, and ammonium. (Some acid phosphates of metals other than the alkali metals also dissolve in water.
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