CN102103811A - Experimental method and device for demonstrating hydroscopicity of concentrated nitric acid - Google Patents
Experimental method and device for demonstrating hydroscopicity of concentrated nitric acid Download PDFInfo
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- CN102103811A CN102103811A CN2009102014239A CN200910201423A CN102103811A CN 102103811 A CN102103811 A CN 102103811A CN 2009102014239 A CN2009102014239 A CN 2009102014239A CN 200910201423 A CN200910201423 A CN 200910201423A CN 102103811 A CN102103811 A CN 102103811A
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- drexel bottle
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Abstract
The invention provides an experimental method for demonstrating the hydroscopicity of concentrated nitric acid, which comprises the steps of: adding concentrated hydrochloric acid in a flask filled with manganese dioxide to prepare chlorine; enabling the generated chlorine to enter a gas washing bottle filled with a saturated sodium chloride solution through a thin glass tube to purify the chlorine; enabling the purified chorine to pass through a gas washing bottle filled with air, or a gas washing bottle filled with concentrated sulfuric acid, or a gas washing bottle filled with concentrated nitric acid and then enter a gas washing bottle filled with a red cloth strip, and comparing results of the three different gas washing bottles; and introducing the residual chlorine in a beaker filled with aqueous sodium hydroxide. The invention also provides an experimental device for completing the experimental method for demonstrating the hydroscopicity of concentrated nitric acid. The experimental device comprises an iron support, beakers, gas washing bottles and the like. By adopting the technical scheme, the experimental method and experimental device have an active effect of obtaining the experimental result of the hydroscopicity of concentrated nitric acid.
Description
Technical field
The present invention relates to absorptive experimental technique of a kind of demonstration red fuming nitric acid (RFNA) and experimental provision thereof.
Background technology
Army is putting down in writing the concentrated sulphuric acid and has water absorptivity in existing textbook and data, and red fuming nitric acid (RFNA) does not have water absorptivity.In the inventor's once accidental test, the inventor puts into the test tube passivation that red fuming nitric acid (RFNA) is housed to aluminium flake, adds blue CuSO after having crossed some hrs
45H
2The O powder, and seal the test tube mouth with rubber stopper.After several days, surprisingly find blue CuSO when observing the test tube bottom
45H
2Some has become white CuSO the O powder
45H
2The O crystal.That is to say CuSO
45H
2Water of crystallization in the O powder is by certain material absorbing! Owing to do not have sneaking into of any impurity in the experimentation, consulting many argumentations of yet not finding to record " red fuming nitric acid (RFNA) has water absorptivity " about the data of red fuming nitric acid (RFNA).Therefore the inventor designs the absorptive experimental technique of a kind of demonstration red fuming nitric acid (RFNA) and confirms that red fuming nitric acid (RFNA) has water absorptivity.
Summary of the invention
The present invention is exactly in order to address the above problem, and provides a kind of demonstration red fuming nitric acid (RFNA) absorptive experimental technique.
The technical matters that will solve required for the present invention can be achieved through the following technical solutions:
The absorptive experimental technique of a kind of demonstration red fuming nitric acid (RFNA) of the present invention may further comprise the steps:
The first step, whether the impermeability of checking experiment device and glass tube be unimpeded, guarantees experiment safety;
Second step splashed into concentrated hydrochloric acid in the flask of manganese dioxide is housed, preparation chlorine;
In the 3rd step, second chlorine that goes on foot generation is entered the Drexel bottle that saturated nacl aqueous solution is housed by thin glass tube carry out purifying;
The 4th step by Drexel bottle that air is housed or the Drexel bottle of the Drexel bottle of the concentrated sulphuric acid being housed or red fuming nitric acid (RFNA) being housed, entered the 3rd step purifying chlorine in the Drexel bottle that red cloth is housed then, passed through the result of three kinds of different Drexel bottles more respectively;
The 5th step, the chlorine feeding in the 4th step is equipped with in the beaker of diluted sodium hydroxide solution, absorb residue chlorine.
The 6th step, detaching device.
In a preferred embodiment of the invention, the red cloth in described the 4th step can be prior heat drying.
The present invention also provides a kind of experimental provision of demonstrating red fuming nitric acid (RFNA) water absorptivity experimental technique, comprise iron stand, flask, Drexel bottle, place a spirit lamp on the described iron stand, described spirit lamp top is for placing an asbestos gauge and being fixed on iron ring on the iron stand, placement one employing iron clamp is fixed on the flask on the iron stand on the described iron ring, described flask is connected by first Drexel bottle that the thin glass tube and at the band rubber stopper of its bottleneck setting is equipped with saturated nacl aqueous solution, and described thin glass tube is passed in the bottle end of described first Drexel bottle of rubber stopper contact that the gas washing bottleneck is provided with;
Described first Drexel bottle also is provided with a thin glass tube, described thin glass tube one distal process goes out described rubber stopper and stretches in described first Drexel bottle, other end extension penetrates at bottleneck and is provided with in second Drexel bottle of rubber stopper, and contacts the bottle end of described second Drexel bottle;
Described second Drexel bottle also is provided with a thin glass tube, described thin glass tube one distal process goes out described rubber stopper and stretches in described second Drexel bottle, other end extension penetrates at bottleneck and is provided with in the 3rd Drexel bottle of rubber stopper, and contacts the bottle end of described the 3rd Drexel bottle;
Described the 3rd Drexel bottle also is provided with a thin glass tube, and described thin glass tube one distal process goes out described rubber stopper and stretches in described the 3rd Drexel bottle, and other end extension covers on one as on the beaker that absorbs tail gas;
Because the good effect that has adopted technique scheme, the present invention to have is: adopt experimental technique provided by the invention and experimental provision can draw red fuming nitric acid (RFNA) and have absorptive experimental result.
Description of drawings
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is a device synoptic diagram of the present invention.
Embodiment
In order to make technological means of the present invention, creation characteristic, to reach purpose and effect is easy to understand,, further set forth the present invention below in conjunction with concrete diagram.
Embodiment 1
As shown in Figure 1, a kind of experimental provision of demonstrating red fuming nitric acid (RFNA) water absorptivity experimental technique provided by the invention, comprise iron stand, flask, Drexel bottle, place a spirit lamp on the described iron stand, described spirit lamp top is for placing an asbestos gauge and being fixed on iron ring on the iron stand, placement one employing iron clamp is fixed on the flask on the iron stand on the described iron ring, described flask is connected by first Drexel bottle that the thin glass tube and at the band rubber stopper of its bottleneck setting is equipped with saturated nacl aqueous solution, and described thin glass tube is passed in the bottle end of described first Drexel bottle of rubber stopper contact that the gas washing bottleneck is provided with;
Described first Drexel bottle also is provided with a thin glass tube, described thin glass tube one distal process goes out described rubber stopper and stretches in described first Drexel bottle, other end extension penetrates at bottleneck and is provided with in second Drexel bottle of rubber stopper, and contacts the bottle end of described second Drexel bottle;
Described second Drexel bottle also is provided with a thin glass tube, described thin glass tube one distal process goes out described rubber stopper and stretches in described second Drexel bottle, other end extension penetrates at bottleneck and is provided with in the 3rd Drexel bottle of rubber stopper, and contacts the bottle end of described the 3rd Drexel bottle;
Described the 3rd Drexel bottle also is provided with a thin glass tube, and described thin glass tube one distal process goes out described rubber stopper and stretches in described the 3rd Drexel bottle, and other end extension covers on one as on the beaker that absorbs tail gas.
The method of demonstration red fuming nitric acid (RFNA) water absorptivity experiment provided by the invention is a method of contrast, needs to prepare the identical experimental provision of the present invention of three covers and experimentizes, and experimental procedure is as follows:
The first step, whether the impermeability of checking experiment device and glass tube be unimpeded, guarantees experiment safety;
Second step splashed into concentrated hydrochloric acid in the flask of manganese dioxide is housed, preparation chlorine;
In the 3rd step, second chlorine that goes on foot generation is entered the Drexel bottle that saturated nacl aqueous solution is housed by thin glass tube carry out purifying;
The 4th step by Drexel bottle that air is housed or the Drexel bottle of the Drexel bottle of the concentrated sulphuric acid being housed or red fuming nitric acid (RFNA) being housed, entered the 3rd step purifying chlorine in the Drexel bottle that red cloth is housed then, passed through the result of three kinds of different Drexel bottles more respectively;
The 5th step, the chlorine feeding in the 4th step is equipped with in the beaker of diluted sodium hydroxide solution, absorb residue chlorine.
The 6th step, detaching device.
Material that is equipped with in described three complete equipments and operation steps are identical in three steps of the first step to the and the 5th step, and when the 4th step, air only is housed in the Drexel bottle of first complete equipment, in the Drexel bottle of second complete equipment concentrated sulphuric acid is housed, red fuming nitric acid (RFNA) in the Drexel bottle of the 3rd complete equipment.The chlorine that described the 3rd step obtains by the 4th step Drexel bottle of this three complete equipment, enters the 5th more respectively and goes on foot the Drexel bottle that red cloth is housed respectively, enters the beaker that absorbs tail gas at last.
The experimental result that described three cover experimental facilitiess carry out is as shown in table 1 below:
Table 1
| Reagent | The cloth change color | The result |
| Air | Obviously (redness → greenish orange look) fades | No water absorptivity |
| Dense H 2SO 4 | Do not fade (redness) | Water absorptivity is very strong |
| Dense HNO 3 | Fade on a small quantity (redness → light red) | Water absorptivity is arranged, but and it is not really strong |
Certainly, more accurate for making experimental result, the red cloth in described the 4th step can be carried out heat drying in advance.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (3)
1. the absorptive experimental technique of demonstration red fuming nitric acid (RFNA) is characterized in that, may further comprise the steps:
The first step, whether the impermeability of checking experiment device and glass tube be unimpeded, guarantees experiment safety;
Second step splashed into concentrated hydrochloric acid in the flask of manganese dioxide is housed, preparation chlorine;
In the 3rd step, second chlorine that goes on foot generation is entered the Drexel bottle that saturated nacl aqueous solution is housed by thin glass tube carry out purifying;
The 4th step by Drexel bottle that air is housed or the Drexel bottle of the Drexel bottle of the concentrated sulphuric acid being housed or red fuming nitric acid (RFNA) being housed, entered the 3rd step purifying chlorine in the Drexel bottle that red cloth is housed then, passed through the result of three kinds of different Drexel bottles more respectively;
The 5th step, the chlorine feeding in the 4th step is equipped with in the beaker of diluted sodium hydroxide solution, absorb residue chlorine.
2. the absorptive experimental technique of a kind of demonstration red fuming nitric acid (RFNA) as claimed in claim 1 is characterized in that, the red cloth in described the 4th step needs heat drying in advance.
3. an experimental provision of demonstrating red fuming nitric acid (RFNA) water absorptivity experimental technique according to claim 1 comprises iron stand, flask, Drexel bottle, it is characterized in that:
Place a spirit lamp on the described iron stand, described spirit lamp top is for placing an asbestos gauge and being fixed on iron ring on the iron stand, placement one employing iron clamp is fixed on the flask on the iron stand on the described iron ring, described flask is connected by first Drexel bottle that the thin glass tube and at the band rubber stopper of its bottleneck setting is equipped with saturated nacl aqueous solution, and described thin glass tube is passed in the bottle end of described first Drexel bottle of rubber stopper contact that the gas washing bottleneck is provided with;
Described first Drexel bottle also is provided with a thin glass tube, described thin glass tube one distal process goes out described rubber stopper and stretches in described first Drexel bottle, other end extension penetrates at bottleneck and is provided with in second Drexel bottle of rubber stopper, and contacts the bottle end of described second Drexel bottle;
Described second Drexel bottle also is provided with a thin glass tube, described thin glass tube one distal process goes out described rubber stopper and stretches in described second Drexel bottle, other end extension penetrates at bottleneck and is provided with in the 3rd Drexel bottle of rubber stopper, and contacts the bottle end of described the 3rd Drexel bottle;
Described the 3rd Drexel bottle also is provided with a thin glass tube, and described thin glass tube one distal process goes out described rubber stopper and stretches in described the 3rd Drexel bottle, and the other end extends connection one glass funnel and covers on one as on the beaker that absorbs tail gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102014239A CN102103811A (en) | 2009-12-18 | 2009-12-18 | Experimental method and device for demonstrating hydroscopicity of concentrated nitric acid |
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| CN2009102014239A CN102103811A (en) | 2009-12-18 | 2009-12-18 | Experimental method and device for demonstrating hydroscopicity of concentrated nitric acid |
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| CN2009102014239A Pending CN102103811A (en) | 2009-12-18 | 2009-12-18 | Experimental method and device for demonstrating hydroscopicity of concentrated nitric acid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103377581A (en) * | 2012-04-28 | 2013-10-30 | 上海市闵行第二中学 | Chemical experiment teaching aids and confirmatory experiment method of dehydration property of sulfuric acid |
| CN104673388A (en) * | 2013-11-28 | 2015-06-03 | 大连隆星新材料有限公司 | Chlorinated paraffin device |
| CN107596868A (en) * | 2017-10-27 | 2018-01-19 | 四川省洪雅青衣江元明粉有限公司 | A kind of Chlorine Scrubber |
-
2009
- 2009-12-18 CN CN2009102014239A patent/CN102103811A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103377581A (en) * | 2012-04-28 | 2013-10-30 | 上海市闵行第二中学 | Chemical experiment teaching aids and confirmatory experiment method of dehydration property of sulfuric acid |
| CN104673388A (en) * | 2013-11-28 | 2015-06-03 | 大连隆星新材料有限公司 | Chlorinated paraffin device |
| CN107596868A (en) * | 2017-10-27 | 2018-01-19 | 四川省洪雅青衣江元明粉有限公司 | A kind of Chlorine Scrubber |
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Application publication date: 20110622 |