Phosphoric Acid → Phosphoric acid, barium salt (2:3)

Participants

Reaction Steps

Barium phosphate was prepared by the following procedure. Barium hydroxide monohydrate (30.0 g, 158.4 mmoles) was dissolved in 3000 ml of distilled water and stirred for one hour. Phosphoric acid (12.2 g of 85%w phosphoric acid, containing 105.6 mmoles of acid) was diluted with 200 ml of distilled water and the resulting solution was added dropwise to the barium hydroxide solution over a seven minute period. A milky white suspension formed. The suspension was stirred for five hours and then filtered through a Buchner funnel to recover a solid which was washed with 1200 ml of distilled water, and filtered to dryness. The solid was further dried in a vacuum oven at 120° C. and 20mm of mercury for several hours. The white solid product was analyzed by X-ray powder diffraction and found to contain Ba3 (PO4)2 as the only crystalline product.

Provenance & Evidence