One of the most important derivatives of hypochlorous acid is bleaching powder.
It may be prepared by the action of bleaching powder on many carbon compounds, such, for example, as ethyl alcohol and acetone (E.
Bleaching powder taken by the mouth is not so deadly.
The usual method of preparation is the addition of hydrochloric acid to bleaching powder, which latter substance is hypochlorite of lime mixed with calcic chloride and, it may be, a little caustic lime.
It is customary to express the value of bleaching powder in terms of "available chlorine," by which is meant the chlorine present as hypochlorite, but not the chlorine present as chloride.
Note 2: Bleaching powder is easily acted upon by the carbonic acid in the air, which liberates the weak hypochlorous acid.
Run in the arsenite solution from a burette until no further reaction takes place on the starch-iodide paper when touched by a drop of the solution of bleaching powder.
A pound of cloth requires for its whitening about half a pound of good average chloride of lime or bleaching powder, as it is commonly called, and this ought to be dissolved in about three gallons of water.
Surely this by the Doctor's own showing is very slender authority for renouncing our long-received doctrines concerning the constitution of bleaching powder.
The chemicing consists in running the goods through a weak solution of bleaching powder (chloride of lime), piling the goods up into heaps, and allowing them to lie overnight, the next day they are finished.
When cotton is passed into strong solutions of bleaching powder and of alkaline hypochlorites and then dried, it is found to be tendered very considerably.
The chemicing is done in stone cisterns, which are fitted with false bottoms, on which the goods can rest, and which allow any insoluble particles of bleaching powder to settle out and prevent them from getting on the goods.
Bleaching powder, lime, and picric acid are received by rail.
In the manufacturing process as originally carried out, free picric acid was mixed with bleaching powder held in suspension with water.
In this manner a small quantity of cobalt oxide[17] is sufficient for the decomposition of an indefinitely large quantity of bleaching powder.
Generally a solution of bleaching powder is alkaline (contains free lime), and therefore, a solution of cobalt chloride is added directly to it, by which means the oxide of cobalt required for the reaction is formed.
Bleaching powder is not generally a safe material for cleansing purposes, as it weakens the texture of clothing.
Bleaching powder, caustic potash or soda, and strong soap are not suitable for cleaning woodwork, because of the action of the alkali on paint and wood; they roughen the surface and discolor the paint.
When carbolic acid, formaline, bleaching powder, and caustic soda are used, the hands should be protected and the clothes should be well rinsed.
Cellars should be frequently cleaned and disinfected, using for the purpose some of the well-known disinfectants, as formaline, bleaching powder, or a dilute solution of carbolic acid.
Bleaching powder, unless protected from the air (carbonic acid), slowly parts with its chlorine.
Footnote 16: A very pure kind of limestone, and one which is largely used in the preparation of bleaching powder, is found at Buxton.
Bleaching powder is a substance prepared by the action of chlorine gas on dry slaked lime, resulting in the formation of a compound which has the property of bleaching or "whitening" vegetable matters.
In this way the amount of bleaching powder required to bleach the pulp is determined.
A maximum yield of fibre is obtained when the least possible quantity of caustic soda is used, but a larger percentage of bleaching powder may be necessary to ensure a well bleached pulp.
Frequently, also, a greater yield of boiled material may involve a larger quantity of bleaching powder, so that it is evident the adjustment of practical conditions requires considerable technical skill and experience.
Bleaching powder undergoes a number of reactions which make it an important substance.
It is used in the preparation of ammonia, bleaching powder, and potassium hydroxide.
Directions Place a quarter of an ounce of bleaching powder in a quart bottle containing a pint of water.
Bleaching powder is prepared by passing chlorine gas over layers of slaked lime (lime to which a slight amount of water has been added).
Bleaching powder cannot be used in bleaching animal fibers such as woolen and silk fabrics.
The bleaching agents most likely to have been used are oxalic, citric, or hydrochloric acid, bleaching powder solution, or acid sulphite of sodium.
The presence of calcium, chlorides, or sulphates in the water in which the paper is soaked will afford some indication of bleaching powder or a sulphite having been used.
The behavior of ink marks when treated with solution of bleaching powder is often characteristic, the older writings resisting longer; but unless the reagent be extremely dilute, writings of all ages are removed almost simultaneously.
This "natural bleach" is still in use in Holland, a higher price being paid for linen bleached in this way than for the same material bleached with the aid of bleaching powder.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "bleaching powder" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
