TABLE of the Combinations ofFluoric Acid, with the Salifiable Bases, in the Order of Affinity.
Fluoric exists ready formed by Nature in the fluoric spars[42], combined with calcareous earth, so as to form an insoluble neutral salt.
The only thing remaining is to endeavour to discover the nature of the fluoric radical, of which we cannot hitherto form any ideas, as the acid does not appear to have been decomposed in any experiment.
The sulphuric acid, from its greater affinity, expels the fluoric acid which passes over and is absorbed by the water in the receiver.
Observations upon theFluoric Acid, and its Combinations.
As fluoric acid is naturally in the gasseous form in the ordinary temperature, we can receive it in a pneumato-chemical apparatus over mercury.
We are obliged to employ metallic vessels in this process, becausefluoric acid dissolves glass and silicious earth, and even renders these bodies volatile, carrying them over with itself in distillation in the gasseous form.
There is no acid except the fluoric which can directly dissolve dry or calcined silica.
They consist of sulphurous acid, sulphuric acid, arsenic and arsenious acids, various gases and fluoric vapours, with solid particles mechanically swept away into the air, besides the coal smoke.
When calcined bones are distilled in a retort with their own weight of sulphuric acid, a little fluoric acid is disengaged, and it acts on the surface of the glass.
On December 28 he wrote in the Laboratory Book, 'We have tried a number of experiments within the last few days on the muriatic and fluoric acids, heating them with potassium.
In the middle of August he experimented on the action of potassium on silicated fluoric gas.
Whilst abroad he had sent as many as seven papers to the Royal Society--on 'Fluoric Acid Compounds and Hydrogen Acids.
On October 23 the Laboratory Book says: 'A series of experiments to attempt to decompose hydrofluoric acid, and to ascertain the constitution of the fluoric combinations.
To decompose fluoric acid gas, and to ascertain the source of the hydrogen which it gives by the operation of potassium.
Fluoric acid, a compound of fluorine and hydrogen, is decomposed during this action, and is changed, by the union of its fluorine with silicon, into the silicated fluoric acid.
Lime, as it is found in nature, is combined with carbonic and sulphuric acids, and less frequently with some of the other acids, as the nitric, fluoric and phosphoric.
When this substance is distilled in a leaden retort, with sulphuric acid, we have sulphate of lime, and fluoric acid gas, called by some hydro-fluoric acid.
If potassium or sodium be heated in fluoric gas, a rapid combustion takes place, in all respects as brilliant as in oxygen gas.
Boron will unite with fluorine, the radical of fluoric acid.
Glass is not acted upon by the acids, except the fluoric or hydrofluoric.
The glass is first covered with a coat of wax, through which the figures to be engraved are to be scratched with a pin; then pouring the fluoric acid over the wax, it corrodes the glass where the scratches have been made.
Davy has been led, from some late experiments on the subject, to consider pure fluoric acid as a compound of a certain unknown principle, which he calls fluorine, with hydrogen.
At present there are only the muriatic and the fluoric acids, which have not had their bases distinctly separated.
Davy has also attempted to decompose thefluoric acid by burning potassium in contact with it; but he has not yet been able by this or any other method, to obtain its basis in a distinct separate state.
There remain then only two that have been called mineral acids, the fluoric and boracic acids, the first of which, as conqueress of the earths is the earth acid, the last being thus the acid of the salts.
In the treatment of both, rye bread, which contains large quantities of fluoric acid, is highly recommended.
Thus, in Derbyshire (England), where the soil is supplied with fluoric acid, grain is said never to lodge.
D] In some soils the fluorides undoubtedly supply plants with soluble silicates, as fluoric acid has the power of dissolving silica.
It was also found by analysis that augite usually contained more lime, less alumina, and no fluoric acid; which last, though not always found in hornblende, often enters into its composition in minute quantity.
In the same year appeared his experiments on fluoric acid and its combinations, constituting one of the most curious and important of all the numerous additions which he has made to analytical chemistry.
When the fluoric acid came in contact with water, a white crust was formed, which proved, on examination, to be silica.
Scheele did not obtain fluoricacid in a state of purity, put only fluosilicic acid; nor were chemists acquainted with the properties of fluoric acid till Gay-Lussac and Thenard published their Recherches Physico-chimiques, in 1811.
Their experiments on fluoricacid are exceedingly valuable.
He had already distinguished himself by his discovery of fluoric acid, and by his admirable paper on manganese.
It was during their investigations connected with this subject, that they discovered fluoboric acid gas, which certainly adds considerably to the probability of the theory of Ampere respecting the nature of fluoric acid.
An Account of some New Experiments on theFluoric Compounds; with some Observations on other objects of Chemical Enquiry.
Ampere, of Paris, containing many ingenious and original arguments in favour of the analogy between the muriatic and fluoric compounds.
At this time, he also entered upon the investigation of fluoric acid, the results of which must be reserved for future consideration.
The fluoric acid, disengaged in the gaseous state, combines with the water that diluted the sulphuric acid, and forms liquid fluoric acid, by which the glass is corroded.
These experiments were made with dry sulphuric acid and fluor spar, with the intention of proving that fluor spar is truly a compound of fluorine and calcium, and not of fluoric acid and oxide of calcium.
Kuhlman proceeded to ascertain the composition of hydro-fluoric acid.
The hydro-fluoric acid acted upon the glass tubes, but being received in water was entirely dissolved, with the exception of the silica it had separated from the glass: no trace of hydrogen appeared.
Dry muriatic acid gas was passed over calcined fluor spar heated to redness in a tube of platina; the fluoride of calcium was decomposed, free hydro-fluoric acid was evolved, and chloride of lime remained in the tube.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "fluoric" in a variety of sentences. We hope that you will now be able to make sentences using this word.
