反应详情

Barium phosphate was prepared by the following procedure. Barium hydroxide monohydrate (5.0 g, 26.4 mmoles) was dissolved in 3000 ml of distilled water and allowed to stir for one hour. Phosphoric acid (2.0 g of 85%w phosphoric, containing 17.6 mmoles of the acid) was diluted with 100 ml of distilled water and added dropwise to the barium hydroxide solution over an eight minute period. A milky white suspension formed and remained as the suspension was stirred for four hours. The suspension was filtered through a Buchner funnel to recover solid which was washed with 1200 ml of distilled water and filtered to dryness. The solid was placed in a vacuum oven at 120° C. and 20mm of mercury for several hours to effect more complete dryness. The white solid was analyzed by X-ray powder diffraction and found to contain Ba3 (PO4)2 as the only crystalline product.

1. customA milky white suspension formed
2. stirringwas stirred for four hours
3. filtrationThe suspension was filtered through a Buchner funnel
4. customto recover solid which
5. washwas washed with 1200 ml of distilled water
6. filtrationfiltered to dryness
7. customwas placed in a vacuum oven at 120° C.
8. wait20mm of mercury for several hours to effect more complete