flocculent precipitate

noun

, Chemistry.

1. a woolly-looking precipitate, as aluminum hydroxide formed by the addition of ammonia to an aluminum-salt solution.

Word History and Origins

Origin of flocculent precipitate¹

First recorded in 1790–1800

Example Sentences

It dissolves readily in water and the aqueous solution decomposes on standing; a dark-brown flocculent precipitate of azulmic acid, C4H5N5O, separating whilst ammonium oxalate, urea and hydrocyanic acid are found in the solution.

From Project Gutenberg

He also obtained a flocculent precipitate which later became granular and showed under the microscope forms like the starfish, and discs with undulated borders.

From Project Gutenberg

Large, persistent bubbles should form on the surface of the liquid and the casein be present as an extremely fine flocculent precipitate which remains suspended for a considerable time.

From Project Gutenberg

When the decoction becomes slightly alkaline, it deposites a red flocculent precipitate, and the fluid is changed from a yellow to a crimson colour.

From Project Gutenberg

The solution is then filtered from a white flocculent precipitate, which contains most of the impurities, into a larger conical flask, of some 500-600 c.c. capacity, and after cooling, rendered just neutral to phenol-phthalein by means of N/2 caustic soda solution, the exact point being reached when the solution acquires a reddish-yellow tint; 25 c.c. of a strong caustic soda solution is then added, and the liquid boiled for about fifteen minutes, the excess of alkali being titrated after cooling, with N/1 or N/2 hydrochloric acid.

From Project Gutenberg