Both of these are converted into silver sulphide when treated with a solution of sodium sulphide.
The material for the toning or darkening of the bleached print is the chemical substance, sodium sulphide, of the formula Na2S.
But before it is retoned the print must be thoroughly washed, as the presence of sodium carbonate does not permit the toning solution to do its work.
Not quite ruined, however, as a bath in a 5 per cent solution of sodium carbonate will discharge the color and then, if the print is faded, it may be redeveloped in an alkaline developer such as metol-hydro.
Ordinary table salt, a mixture of solid sodium and gaseous chlorine, does a lot of work in the human body.
Sodium and potassium are equally necessary, and so are sulphur, chlorine, and fluorine.
Washing soda, or sodium in union with carbon and oxygen, is another substance which performs an indispensable duty.
Chlorides--chloride of sodium or common salt being that usually met with--may be detected by adding a drop or two of nitrate of silver to half a wineglassful of the water, a few drops of nitric acid being then added.
In making glass to be used for mirrors, a considerable portion of sodium sulphate is used, and in annealing, this is partly reduced to sodium sulphide, which effloresces on the surface of the glass.
Sodium chloride diminishes the solvent action of water on uric acid and the urates; but potassium salts, on the contrary, do not, they may even increase the action.
The most important salts are calcium phosphate, carbonate and fluoride, sodium chloride, potassium phosphate and chloride, and compounds of magnesium, iron and silicon.
Natural and properly cooked foods are so rich in sodium chloride and other salts that the addition of common salt is unnecessary.
Of course, the sodium chloride in the flesh of the herbivora and frugivora is obtained from the vegetable matter forming their food, and very few of them have the opportunity of obtaining it from salt-licks and mineral sources.
Third; the taking of sodium bicarbonate towards the end of the period of digestion, in order to neutralise the acid in the stomach.
They should be composed of sodium bicarbonate and tartaric acid, in such correct proportions that upon the addition of water only sodium tartrate and carbon dioxide (carbonic acid) should result.
Another formula, which is slow rising and well adapted for pastry, is sodium bicarbonate 4 ozs.
Even should it be admitted, that certain vegetables contain too little sodium salts, a very little salt added to such food would be sufficient; there is no excuse for the general use of it, and in such a great variety of foods.
The good effect of milk in such diseases has long been known; it is probably due to its relative poverty in sodium and potassium chlorides.
They must have the power of storing up the sodium chloride from plants in sufficient quantity, whilst the potash salts pass away.
They are commonly composed of--in addition to sodium bicarbonate--acid calcium phosphate, calcium superphosphate and calcium sulphate.
One of the most remarkable habits of these times is the extensive use of common salt or sodium chloride.
Some powders contain an excess of sodium bicarbonate.
This has been explained by the fact that potassium salts are characteristic of plants, whilst sodium chloride is the principal saline constituents of blood and of flesh.
Lactate of sodium increases alkalinity of blood, but only within narrow limits, and is the only chemical remedy suggested.
This acid condition is due to two salts, sodium hydrogen carbonate and sodium hydrogen phosphate; these cause the symptoms observed and infiltration of fat in organs, leading to feebleness of heart action.
Sodium Benzoate: in infectious and eruptive fevers; antiseptic and antipyretic.
Lithium Carbonate or Citrate with Sodium Arsenite: in gouty cases.
Sodium Phosphate: in bilious sick headache; also in catarrh of the gall-duct in children: dose, 10 grn.
MERCK'S Sodium Salicylate is the only brand which yields a clear and colorless solut.
In chemical language it is called sodium chloride.
The symbol is NaCl, which means that a molecule of salt is composed of one atom of sodium and one of chlorine.
Formerly the chemist when he wished to obtain sodium extracted it from common salt and discharged the chlorine gas into the air.
The cooler vapors of sodium and thallium have the power of absorbing exactly those rays from the hotter lime or other similar source which the vapors by themselves would emit to form bright lines.
When such eggs are treated with a weak solution of sodium cyanide or chloral hydrate, they return to the resting condition.
Other substances like salts of sodium and silica are also found, but these are not regarded as essential to the life and growth of plants.
Let us insert a screen between the lamp and the lime light so as to cut out the latter, and we shall see the bright lines of sodium and thallium reappear as in the upper of the two spectra.
Pieper that the salts in solution consist for the most part of chlorides, the chlorides of calcium and sodium largely prevailing.
By dipping the carbon-point used for the positive electrode into a solution of common salt, and replacing it in the lamp, the bright yellow band produced by the sodium vapour stands out from the spectrum.
When the sodium flame is caused to act upon the beam it is that particular yellow band that is obliterated, an intensely black streak occupying its place.
So also chlorine and sodium are elements, the former a pungent gas, the latter a soft metal; and they unite together to form chloride of sodium or common salt.
Placing in front of the electric lamp the intense flame of a large Bunsen's burner, a platinum capsule containing a bit of sodium less than a pea in magnitude is plunged into the flame.
The sodium soon volatilises and burns with brilliant incandescence.
It is then forced into the solution of sodium carbonate in the absorption tower, 65 ft.
The saving in lime is stated to be one ton for each ton of sodiumcarbonate produced, or in cash value about 10s.
In outline the process is as follows: We will suppose that a quantity of bicarbonate of sodium has been just precipitated from a brine solution, and we have the residual ammonium chloride to deal with.
The method is based on the fact that if dilute impure carbonic acid is passed into a solution of carbonate of sodium, the carbonic acid is absorbed, bicarbonate of sodium being formed, and the diluting gases passing away.
After saturation the mud of bicarbonate of sodium is drawn off and passed into the "decomposer," a tower 35 ft.
It is not unfrequently considered important to test urine for the sodium salts of the conjugate biliary acids, taurocholic and glycocholic.
The bicarbonate of sodium on heating gives up the extra carbonic acid, which can be collected and stored pure, while the liquor passes back to simple carbonate of sodium, to be used over again as an absorbent.
The precipitated bicarbonate of sodium is removed and washed, and prepared for the market in whatever form is required, the sulphureted hydrogen gas being led to a holder and stored, as before stated.
Sulphate ofsodium is formed, and a large amount of hydrochloric acid is given off.
MIT] Collective noun used to refer to potato chips, pretzels, saltines, or any other form of snack food designed primarily as a carrier for sodium chloride.
Thus the change in properties is well illustrated when these two dangerous elements, sodium and chlorin, unite to form the harmless compound which we call common salt.
Sodium is called natrium in Latin, and Na is the symbol used in English to be in harmony with all other languages, for practically all use the same chemical symbols.
Sodium and potassium are very similar elements in some respects, and in the free state they are very peculiar, apparently taking fire when thrown into water.
The movement of electric charges would be affected by a magnetic field, and hence the discovery by Zeeman that the spectral lines of sodium were doubled by a strong magnetic force gave confirmatory evidence to the theory of electrons.
Neumann regards Rindfleisch's doctrine as untenable, since the process which he observed is chiefly the result of a severe injury of the blood from the sodium chloride solution and the teasing.
Thus acid sodium sulphate, normal sodium sulphate, and zinc sulphate have the formulae Na.
CO2H The reduction of o-oxybenzoic acids by sodium in amyl alcohol solution has been studied by A.
The term radical is given to a group of atoms which persist in chemical changes, behaving as if the group were an element; the commonest is the ammonium group, NH4, which forms salts similar to the salts of sodium and potassium.
The same decomposition may be effected by igniting with iron, ferric oxide and sodium carbonate (E.
The manufacture of glass, also practised in Egypt, demanded a knowledge of sodium or potassium carbonates; the former occurs as an efflorescence on the shores of certain lakes; the latter was obtained from wood ashes.
In particular, the salts of potassium, sodium and ammonium were carefully investigated, but sodium and potassium salts were rarely differentiated.
The solution contains magnesium, sodium and potassium, which are separately distinguished by the methods given under their own headings.
A standard sodium hydrate solution can be prepared by dissolving 42 grammes of sodium hydrate, making up to a litre, and diluting until one cubic centimetre is exactly equivalent to one cubic centimetre of the sulphuric acid.
CO2C2H5)2, under the influence of sodium to succinosuccinic ester, a diketohexamethylene dicarboxylic ester, which readily yields dioxyterephthalic acid and hydroquinpne (F.
Beneath its ultra-violet rays Black Hood discovered that the face powder took on a phosphorescent glow, proving that sodium naphthionate had been added to it.
You see, the naphthionate of sodium in that powder sticks to just about anything.
This has been called anomalous dispersion, and similar effects have been observed in iodine and sodium vapours, and in solutions of colours derived from aniline which exhibit surface colour.
In this table n is the refractive index of the glass for sodium light (the D line of the solar spectrum), while the letters C, F and G' refer to lines in the hydrogen spectrum by which dispersion is now generally specified.
If, however, its presence is recognized sodium phosphate may be substituted.
This proved to him the existence of sodium in the sun's atmosphere.
He also found that, if he used a limelight instead of the sunlight and passed it through the flame with salt, the spectrum showed the D line black; or the vapour of sodium absorbs the same light that it radiates.
The D line of sodium is a double line, and in the same eclipse (1868) an orange line was noticed which was afterwards found to lie close to the two components of the D line.
If sodium or common salt be thrown on the colourless flame of a spirit lamp, it gives it a yellow colour, and its spectrum is a bright yellow line agreeing in position with line D of the solar spectrum.
The changes which have been observed are produced by salts from the soil, especially sodium chloride, held in solution by water.
A mixture of iron filings and sodium chloride exposed to moisture is converted in a few days into a black powder which has the following composition:--11.
In earth so full of sodium chloride as is that of Egypt, objects of iron will be readily corroded, and the explanation given above will account for the paucity of iron remains of Egyptian origin.
The white precipitate is the silver chloride, whilst the sodium nitrate which is produced at the same time remains in solution and is therefore not visible.
An excellent reducing agent for single coins, the characters of which are rendered illegible by a layer of silver chloride, is molten potassium cyanide, or a mixture of this substance with sodium or potassium carbonate.
These turbid suspensions of clay may be rapidly cleared by the addition of sodium chloride which increases the surface tension of the solution.
A very small proportion of some substances--notably the oxides of sodium and potassium--will greatly alter the behaviour of true clay when heated and will produce an impervious mass in place of a porous one.
Phenyl indazole, on reduction with sodium and absolute alcohol, gives a dihydro derivative (K.
Dilute nitric acid oxidizes it to phthalic acid, and sodium reduces it in alcoholic solution to hydrindene, C9H10.
Potassium thrown on water bursts into flame, and sodium does so under certain conditions.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "sodium" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: gold; iron; lead; metal; silver
