noun
definition
Any salt of hydrofluoric acid; for example, potassium fluoride.
definition
A binary compound of fluorine and another element or radical.
Examples of fluoride in a Sentence
With the exception of the fluoride, these substances are readily soluble in water and arc deliquescent.
In some respects there is a very marked difference between fluorine and the other members of the group, for, whilst sodium chloride, bromide and iodide are readily soluble in water, sodium fluoride is much less soluble; again, silver chloride, bromide and iodide are practically insoluble in water, whilst, on the other hand, silver fluoride is appreciably soluble in water.
Stannous Fluoride, SnF 2, is obtained as small, white monoclinic tables by evaporating a solution of stannous oxide in hydrofluoric acid in a vacuum.
The hydrated fluoride, CrF3.9H20, obtained by adding ammonium fluoride to cold chromic sulphate solution, is sparingly soluble in water, and is decomposed by heat.
The fluoride is found native as sellaIte, and the bromide and iodide occur in sea water and in many mineral springs.
Scheele had done, and because he was employing a glass vessel he got "fluor acid air" (silicon fluoride).
Moissan in 1886 by the electrolysis of pure anhydrous hydrofluoric acid containing dissolved potassium fluoride.
It can also be prepared in the anhydrous condition by passing a current of hydrogen over dry silver fluoride.
It may be condensed to a dark red liquid which is decomposed by moist air into chromic acid and chromic fluoride.
Crystallized alumina is also obtained by heating the fluoride with boron trioxide; by fusing aluminium phosphate with sodium sulphate; by heating alumina to a dull redness in hydrochloric acid gas under pressure; and by heating alumina with lead oxide to a bright red heat.
Aluminium fluoride, AlF 3, obtained by dissolving the metal in hydrofluoric acid, and subliming the residue in a current of hydrogen, forms transparent, very obtuse rhombohedra, which are insoluble in water.
In 1886 he succeeded in obtaining the element fluorine in the free state by the electrolysis of potassium fluoride and anhydrous hydrofluoric acid at a low temperature.
Thallous fluoride, T1F, forms white glistening octahedra; it is obtained by crystallizing a solution of the carbonate in hydrofluoric acid.
It resembles potassium fluoride in forming an acid salt, T1HF 2.
The bromide MnBr2.4H20, iodide, Mn12, and fluoride, MnF2, are known.
Manganic Fluoride, MnF3, a solid obtained by the action of fluorine on manganous chloride, is decomposed by heat into manganous fluoride and fluorine.
The salts of scandium are all colourless, the chloride and bromide corresponding in composition to Sc 2 X 6.12H 2 0; the fluoride is anhydrous.
Thorium fluoride, ThF 4, is obtained as a heavy white insoluble powder by dissolving the hydrate in hydrofluoric acid and evaporating.
By precipitating a thorium salt with a fluoride, a gelatinous hydrate, ThF 4.4H 2 O, is obtained.
Acid potassium fluoride precipitates K2ThF6 4ThF4 H20 from a solution of thorium chloride.
Potassium thorofluoride, K2ThF6 4H20, is a heavy black powder formed by boiling the hydroxide with potassium fluoride and hydrofluoric acid.
Cupric fluoride, CuF 2, is obtained by dissolving cupric oxide in hydrofluoric acid.
Antimony trifluoride, SbF 3, is obtained by dissolving the trioxide in aqueous hydrofluoric acid or by distilling antimony with mercuric fluoride.
Silver fluoride, AgF, is obtained as quadratic octahedra, with one molecule of water, by dissolving the oxide or carbonate in hydrofluoric acid.
Even the strongest laboratory oxidizing agents are unable to oxidize hydrogen fluoride.
We have shown that fluoride anions can be used to generate helical structures in the solid state.
Thorough brushing by carers and the use of antibacterial gels and fluoride help to prevent dental caries and gum disease.
Reported use of fluoride toothpaste has a consistent effect in reducing dental caries across Europe using national data.
It reacts with moisture to form hydrogen fluoride, a highly corrosive acid.
This fluoride would come from food and drink or from fluoride dietary supplements.
The first is the comparatively very high lattice enthalpy of the solid fluoride.
The volume of the samples was measured, they were analyzed for fluoride concentration and the 24-hour urinary fluoride excretion was calculated.
Anybody with a varied diet will anyway ingest adequate fluoride.
The whole purpose of adding fluoride to water is to derive a medical benefit.
Benefits of green tea Green tea also contains fluoride which is good for the teeth.
Do you think people are wrong to protest about putting fluoride in the water supply?
Liquid hydrogen fluoride is also a very strong acid for the same reason.
The crystal used in this experiment is lithium fluoride.
The fluoride added to water is 20 times more toxic than calcium fluoride, which occurs naturally in many waters.
Meade Optical Coatings Aluminum Coatings with magnesium fluoride over coat provides bright images full of detail.
We offer the use of topical fluoride following the restoration of teeth by our modern materials.
Offices have access to drinking water (not yet with added fluoride) it is provided on tap.
The fluoride in toothpastes is a chemical made from the mineral fluorite.
So have Japan and India, where fluoride occurs naturally and skeletal fluorosis (thickening of bones) is prevalent.
Fluoride is implicated in pre-senile dementia and Alzheimer's disease. n. Fluoride causes fluorosis.
In those cases, all you get produced are the steamy fumes of the hydrogen halide - hydrogen fluoride or hydrogen chloride.
That's equally true for hydrogen fluoride or hydrogen iodide.
Using a good fluoride mouthwash will help gum infections and, if you gargle, it can stop you getting sore throats.
We basically just do not show any deficiencies of phosphorous, potassium, sodium, sulfur, chloride or fluoride.
The chloride gives a white precipitate; the fluoride doesn't give a precipitate.