| 单词 | methyl orange |
| 例句 | The anion of methyl orange, In−, is yellow, and the nonionized form, HIn, is red. Chemistry 2019-02-14T00:00:00Z A few drops of starch solution are then added, and when the blue colour has nearly vanished a drop or two of methyl orange makes the end reaction very sharp. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" To quickly determine total alkali in soap a weighed portion of the soap may be ignited to a white ash and the ash titrated for alkalinity using methyl orange as an indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Alkalinity of the Soluble Ash—Official Cool the filtrate from 9 and titrate with N/10 hydrochloric acid, using methyl orange as an indicator. All About Coffee The constitution of methyl orange follows from the fact that on reduction by stannous chloride in hydrochloric acid solution it yields sulphanilic acid and para-aminodimethyl aniline. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon" When we add acid to a solution of methyl orange, the increased hydronium ion concentration shifts the equilibrium toward the nonionized red form, in accordance with Le Châtelier’s principle. Chemistry 2019-02-14T00:00:00Z About 7-8 grammes of the sample are dissolved in water, and made up to 100 c.c., and the total alkalinity determined by titrating 20 c.c. with N/1 acid, using methyl orange as indicator. The Handbook of Soap Manufacture Pipette off 50 cubic centimeters into a 200 cubic centimeter beaker, dilute slightly with distilled water, add a few drops of methyl orange indicator and titrate with normal acid. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Thus blue litmus is changed to red, and yellow methyl orange is changed to red. An Elementary Study of Chemistry Run into a flask 50 c.c. of the standard "acid," tint with methyl orange, and run in from a burette the solution of ammonia till neutralised. A Text-book of Assaying: For the Use of Those Connected with Mines. The equilibrium in a solution of the acid-base indicator methyl orange, a weak acid, can be represented by an equation in which we use HIn as a simple representation for the complex methyl orange molecule: Chemistry 2019-02-14T00:00:00Z Total alkali is estimated by dissolving 2 grammes in distilled water, and titrating when cold, with N/1 acid, using methyl orange as indicator. The Handbook of Soap Manufacture Methyl orange Red Yellow Very slightly acid Phenolphthalein Colorless Red Acid Litmus Red Blue Acid It may be further stated that methyl orange at the neutral point is orange in color. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. A weak solution of Congo red or methyl orange may be used. Nitro-Explosives: A Practical Treatise Disconnect the receiver, and tint its contents with methyl orange. A Text-book of Assaying: For the Use of Those Connected with Mines. The indicators in most common use for acid and alkali titrations are methyl orange, litmus, and phenolphthalein. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Free Carbonated Alkali.—The residue on the filter paper from the above determination is washed with hot water, and the aqueous filtrate titrated with N/10 acid, using methyl orange as indicator. The Handbook of Soap Manufacture The barium carbonate is added through the funnel at the top of the tank mixed with a little water and the lye tested until it is neutral to methyl orange indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The amount of acid necessary to change the methyl orange to pink is a measure of one half of the carbonate present. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Take 50 c.c., tint with methyl orange, and titrate with the normal solution of acid. A Text-book of Assaying: For the Use of Those Connected with Mines. In the following discussion of the principles underlying the behavior of the indicators as a class, methyl orange and phenolphthalein will be taken as types. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The amount of the boric acid radicle may be determined by incinerating 5-10 grammes of soap, extracting with hot dilute acid, filtering, neutralising this solution to methyl orange, and boiling to expel carbon dioxide. The Handbook of Soap Manufacture For the carbonates about 1 gram may be weighed, washed into a 400 cubic centimeter beaker, diluted with distilled water, methyl orange indicator added and titrated with normal acid. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The comparison of the acid and alkali solutions was made, using methyl orange as an indicator, while the titration of the oxalic acid is made with the use of phenolphthalein. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Tint with methyl orange, and run in from an ordinary burette normal solution of sulphuric acid until a pink tint is got. A Text-book of Assaying: For the Use of Those Connected with Mines. Of the common indicators methyl orange is the most sensitive toward alkalies and phenolphthalein toward acids; the others occupy intermediate positions. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes When methyl orange solution is used as indicator, titrations must be carried out cold. The Handbook of Soap Manufacture If borax is present the carbon dioxide is boiled off after neutralizing exactly to methyl orange; cool, add mannite and phenolphthalein and titrate the boric acid with standard alkali. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. No indicator is known which, like methyl orange, can be used within the solution, to show when the oxidation process is complete. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes In standardizing a hydrochloric acid solution it is found that 47.26 cc. of hydrochloric acid are exactly equivalent to 1.216 grams of pure sodium carbonate, using methyl orange as an indicator. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes That methyl orange should be most sensitive toward alkalies is evident from the following considerations: Methyl orange is a weak base and, therefore, but little dissociated. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes In the presence of methyl orange, the color change takes place only when the carbonate has been completely neutralized. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Dissolve the ash in distilled water and titrate total alkalinity, using as indicator methyl orange cold or litmus boiling. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. On titrating with standard acid, it required 15.26 cc. for a change in color, using phenolphthalein, and 17.90 cc. additional, using methyl orange as an indicator. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The sample was titrated with hydrochloric acid until the pink of phenolphthalein disappeared, and on the addition of methyl orange the solution was colored pink. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Pour over the carbonate in each beaker about 80 cc. of water, stir until solution is complete, and add two drops of methyl orange solution. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes A new sample of the same weight required exactly 30 cc. of the same acid for neutralization, using methyl orange. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes One hundred cubic centimeters of the solution, when titrated with 0.1062 N hydrochloric acid, using methyl orange as an indicator, requires 38.60 cc. for complete neutralization. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes |
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