This may be ascertained by determining the quantity of sulphuric acid required to neutralise a given weight of the sample under examination, as indicated by litmus paper.
It is not perfectly soluble in water; and does not turn the colour of litmus red.
It feebly reddens litmus paper, extinguishes the flame of a burning taper, and forms a white precipitate in aqueous solutions of lime and baryta, which is soluble in acetic acid.
By means of litmus paper the process may be followed and observed through all its stages; the alkaline reaction of the milk ceases as soon as the coagulation begins.
Agitate the ether that distils over, first with a little milk of lime, till it ceases to redden litmus paper, and then with half its volume of concentrated solution of chloride of calcium.
Genuine French brandy always reddens blue litmus paper, from containing a little acetic acid; the old coloured varieties are also blackened by a solution of a persalt of iron.
In fresh milk these substances may be readily detected by the property it possesses of restoring the colour of reddened litmus paper.
It turns litmus paper red; sometimes very slightly, and occasionally even not at all.
Litmus paper all along the banks and nothing but ozone.
Litmus paper tests made all along the river show--but you can read it all in the prospectuses; or the Santonian will recite it for you, word by word.
The aqueous solution of these crystals, acted upon by cold magnesia and filtered, then restores the colour of reddened litmus paper; renders syrup of violets green; and when evaporated furnishes the altheine free from malic acid.
The stream of gas brought away small portions of chlorine with it, but they were not sensible to the smell, and could only be detected by putting litmus paper into the current.
Even the potash in tincture oflitmus may be discovered by it; for, on adding a few drops of carbazotic acid, dissolved in alcohol, to infusion of litmus, crystals of the salt gradually separated.
Continuing the introduction of the chlorine, the solution in the first bottle gradually became yellow, the gas not being yet visible by its colour in the atmosphere above the solution, although chlorine could be detected there by litmus paper.
It was now suspected that all mineral substances, emitting an argillaceous odour, contained ammonia; a great number of specimens were tried, being moistened with solution of caustic potash, and examined by litmus paper.
Lime, its hydrate and sulphide of calcium, have a strong alkaline reaction upon red litmus paper.
If strongly heated and moistened has an alkaline reaction on litmus paper due to the presence of Ca.
In the fused state, and at the usual temperature, ammonia is a pungent gas, and exerts a reaction upon litmus paper similar to potash and soda.
This can be easily done by moistening the litmus paper, and then inserting the end of it in the tube.
The substances of this group are distinguished from the preceding by their insolubility in water, in their pure or hydrated state--that they have no alkaline reaction upon litmus paper, nor form salts with carbonic acid.
A piece of litmus paper indicates that this oil is acid, as it is quickly changed to red by contact with it.
When strongly heated and then moistened has an alkaline reaction on red litmus paper.
Bergman tested Black's gas with litmus and found it gave an acid reaction and in 1779 Lavoisier demonstrated that it consisted of carbon and oxygen.
In order to detect the presence of acids, the alimentary canal and contents are first boiled with water which is renewed until the solution ceases to exhibit an acid reaction when tested with litmus paper.
The result of the evaporation may be solid; more frequently, however, a milky liquid remains which restores the blue color to reddened litmus paper; if so, the presence of a vegetable alkaloid is certain.
In order to ascertain if this be the case, it is advisable, before wetting the paper, to slightly press it upon a sheet of moist litmus paper: the acid spots will then leave a reddish trace upon the latter.
If, however, the paper is acid only in certain spots, and these points produce a red coloration upon blue litmus paper, having the form of letters, the indication is of value.
It is, therefore, well to test all milk with blue litmus paper before feeding it to young children.
Then hold a piece of blue litmus paper in the acid solution, noting that it is turned red.
First hold in the escaping gases a wet strip of red litmus paper.
Hold a piece of red litmus paper in the soda solution, noting that it is turned blue.
Add acid to the soda solution, and soda to the acid solution, until the conditions are reversed, testing with the red and blue litmus papers.
Hold, for a minute or longer, a narrow strip of red litmus paper in the mouth, noting any change in the color of the paper.
Then add enough of the bicarbonate of soda solution till it turns the litmus paper back to blue.
Dip a piece of blue litmus paper into the solution, and if it does not turn the paper red add a little more of the gold solution until it does.
If more than a trace were present the litmus paper would not be sufficiently sensitive for the test.
The soil is almost neutral," said Percy, testing withlitmus and acid.
This test with litmus paper is a test for soil acidity, and the fact that the moisture of the soil has turned the litmus from blue to red shows that this soil is acid, or sour.
The bismuth hydroxid is collected on a filter, washed with hot water until a few drops of the filtrate no longer turn litmus paper blue, dried and heated to constant weight and weighed as bismuth oxid.
An amorphous, yellow, nearly odorless and tasteless powder, neutral to moistened litmus paper.
After a stated time, the animal was killed, and the reaction of the pleural or peritoneal surface was tested with blue litmus paper.
They are applied: (a) Drop to litmus paper and this to gums.
The diluted solution is acid in reaction toward litmus and phenolphthalein and alkaline toward methyl orange.
Neutral between five slightly acid to litmus after ten minutes; and ten minutes taste almost gone in two minutes Gums, a few drops between cheeks and gums: Neutral between ten Five per cent.
Applied to gums on litmus paper: Chlorlyptus: Red color becomes gradually feebler and does not spread on the paper.
The few drops of liquid which were in the phial before mentioned were now examined: they had no action on litmus paper, they smelt of camphor and acetate of ammonia.
I found them both to have an acid reaction on litmus paper, the contents of the beer bottle very decidedly so; but on the application of the usual tests employed for the detection of oxalic acid, not a trace of it could be found.
After forty-eight hours the process was examined: Paper tinged with litmus plunged into the tube containing the transmitting or positive wire was immediately strongly reddened.
And in the case of several worms, the contents of the alimentary canal were found to be plainly acid, as shown by litmus paper.
Any druggist can furnish the litmus paper, and give you a demonstration of how it acts on contact with alkali.
You can ascertain the presence of alkali by using red litmus paper, which will be turned blue by the alkali in the soil, if the soil is moist enough.
Frequently on heating litmus milk the blue color disappears due to a reduction of the litmus.
The milk should show blue when the litmus is added or be made to by the addition of normal NaOH solution.
Liquid media such as broth, milk, litmus milk, indol and nitrate broths are used in the above-mentioned tubes when small quantities only are to be worked with.
Some kinds prefer a slightly acid reaction, some a slightly alkaline, and some a neutral (with reference to litmusas indicator).
Litmus milk is milk as above to which litmus has been added as an acid production indicator.
Defn: Having neither acid nor basic properties; unable to turn red litmus blue or blue litmus red; -- said of certain salts or other compounds.
Note: Litmus is used as a dye, and being turned red by acids and restored to its blue color by alkalies, is a common indicator or test for acidity and alkalinity.
Defn: To examine or try, as by the use of some reagent; as, to test a solution by litmus paper.
Test fresh milk with red litmus paper; it should turn the paper pale blue, showing that it is slightly alkaline.
The alkalinity may be noted by adding previously some neutral litmus solution.
Touch a few drops of blood fresh from the finger, with a strip of dry, smooth, neutral litmus paper, highly glazed to prevent the red corpuscles from penetrating into the test paper.
Place aside for a day or two, and then test with blue litmus paper; it will be found to be acid.
Soluble litmus tablets are often obtainable, but the litmus as commonly supplied to the market is mixed with calcium carbonate or sulphate and compressed into lumps.
Litmus can be employed successfully with the strong acids and bases, and also with ammonium hydroxide, although the salts of the latter influence the indicator unfavorably if present in considerable concentration.
It is, therefore, necessary to precipitate the zinc in a nearly neutral solution, which is more accurately obtained by adding a drop of a litmus solution to the liquid than by the use of litmus paper.
The alcohol is decanted and drained off, after which the litmus is extracted with hot water until exhausted.
Note 1), and drop in, with the aid of a dropper, dilute nitric acid until the blue of the litmus just changes to red.
If a piece of white cloth be dipped in the mixture it will be changed to blue; yellow cloth, in the same mixture, may be changed to green; red to purple; and blue litmus paper to red.
Test a bit of cream of tartar with moistened litmus paper.
When neither pink nor blue litmus paper changes color a neutral substance is present, i.
If the blue litmus paper changes color, carefully add a little more of the soda solution.
When pink litmus paper changes to blue, an alkaline substance is present.
If there is still a change in color, add soda solution until the litmus does not change.
If it changes color, keep adding the soda mixture, until the litmus paper does not change, as in Experiment 68.
Dip the end of a piece of blue litmus paper in it.
When blue litmus changes to pink, an acid is present.
Test the mixture in the saucepan with blue litmus paper.
If the mixture turns the litmus paper red, it must have more lime-water added to make it alkaline.
A piece of blue litmus paper will be convenient to prove that the mixture is alkaline.
The end is said to be determined by the absence of a precipitate on adding silver nitrate to the wash water, or by the absence of any action on blue litmus paper.
Potassium acetate and sodium acetate show only slight action, because the solution is too alkaline, but strip if acetic acid be added until litmus is just reddened.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "litmus" in a variety of sentences. We hope that you will now be able to make sentences using this word.
