CN210324818U

CN210324818U - Improved device for preparing sulfur dioxide and performing property experiment

Info

Publication number: CN210324818U
Application number: CN201921211142.7U
Authority: CN
Inventors: 赵益汝
Original assignee: Shaoxing Yangming Middle School
Current assignee: Shaoxing Yangming Middle School
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-04-14
Anticipated expiration: 2029-07-29

Abstract

The utility model discloses a sulfur dioxide prepare with improvement device of nature experiment, including three-necked flask, the syringe, glass pipe and balloon, be equipped with the rubber buffer on one side bottleneck of three-necked flask and the middle bottleneck respectively, the cover is equipped with the balloon on the opposite side bottleneck of three-necked flask, the syringe is inserted and is established on the rubber plug that is located one side and the syringe needle of syringe runs through the rubber buffer and stretches into in the three-necked flask, the one end of glass pipe is inserted and is established in the rubber buffer that is located in the middle of, the other end of glass pipe stretches into in the three-necked flask, the interval is equipped with blue litmus paper test paper ring on the glass pipe, fuchsia test paper ring and acid potassium permanganate solution test paper ring. The utility model has the advantages of the device integration, the reagent quantity is few, the paper ring experiment phenomenon is obvious, make sulfur dioxide tail gas handle portably, to environment friendly.

Description

Improved device for preparing sulfur dioxide and performing property experiment

Technical Field

The utility model relates to a teaching experiment technical field especially relates to a sulfur dioxide prepare with the improvement device of nature experiment.

Background

The preparation and the property of sulfur dioxide are one of key knowledge of high school chemistry, and relevant experiments are designed for the knowledge points in human education version (Songchen Qi Min Shu, general high school course standard experiment textbook. chemical 1 (mandatory) (3 rd edition) [ M ]. Beijing: people education publisher, 2007: 70-74.), Su education version (Wang Zhanghao Su Shu, general high school course standard experiment textbook. chemical 1 (mandatory) (2 nd edition) [ M ]. Nanjing: Jiangsu education publisher, 2007: 38-45.). Taking suzui high school chemistry 1 as an example, sulfur dioxide property experiments in textbooks need to prepare and collect sulfur dioxide gas in advance, and the method needs large amount of medicine, easily causes gas leakage, and fails to treat tail gas to pollute atmosphere. Based on the defects, Wu Minsheng (development and application of a liquid feeding pipe in Wu Minsheng. minitype chemical experiment [ J ]. chemical teaching, 2010, (9): 5-6) and the like propose an integrated improved device for preparing sulfur dioxide and detecting properties, as shown in fig. 1, the mouth of a flask 111 containing anhydrous sodium sulfite, the upper end orifice of a branch test tube 113A containing purple litmus test solution, the upper end orifice of a branch test tube 114B containing magenta test solution, the upper end orifice of a branch test tube 115C containing bromine water and the upper end orifice of a branch test tube 116D containing potassium permanganate solution are all provided with an A rubber plug 119, a separating funnel 112 containing 70% concentrated sulfuric acid solution by mass fraction is inserted into the A rubber plug 119 of the flask 111, and the flask 111, the branch test tube 113A, the branch test tube 114B, the branch test tube 115C, the branch test tube 116D and the beaker 117 containing sodium hydroxide solution are connected in sequence through an air duct 118; the device can enable sulfur dioxide gas generated in the flask 111 to sequentially pass through four test tubes with purple litmus test solution, fuchsin test solution, bromine water and potassium permanganate solution, and research on the properties of the sulfur dioxide is completed by observing the color change of the test solutions in the test tubes with the four test tubes with the purple litmus test solution, the fuchsin test solution, the bromine water and the potassium permanganate solution; the device integrates sulfur dioxide preparation and property inspection, is provided with a tail gas treatment device (adopting a sodium hydroxide solution to treat sulfur dioxide gas) as a demonstration experiment device, can basically meet the observation of students on experimental phenomena, and still has the defects of huge device, large reagent dosage, unobvious subsequent experimental phenomena under the condition of insufficient sulfur dioxide amount and the like. A further improvement device is proposed in high-quality lessons in Zhejiang province in 2011, as shown in fig. 2, a rubber plug B121 is arranged on a tube orifice at the upper end of a branch test tube E120 filled with anhydrous sodium sulfite solid, one end of a glass tube A122 is inserted into the rubber plug B121, the other end of the glass tube A122 extends into the branch test tube E120, a purple litmus test paper ring 123, a potassium permanganate test paper ring A124 and a sodium hydroxide phenolphthalein test paper ring 125 are sequentially sleeved on the outer wall of the glass tube A122 from bottom to top, an injector A126 filled with a concentrated sulfuric acid solution with the mass fraction of 70% is inserted into the rubber plug B121, concentrated sulfuric acid is injected into the branch test tube E120 through the injector A126, and an A balloon 127 used for collecting sulfur dioxide is hermetically fixed on a side tube orifice of the branch test tube E120; the device integrates a complex device, greatly saves the dosage of medicines and reagents, has obvious experimental phenomenon, is convenient for students to observe, and still has the following defects: because the used sulfuric acid is relatively concentrated and has high density, the concentrated sulfuric acid is difficult to extract and inject in the actual operation, and potential safety hazards exist; the experimental link of sulfur dioxide bleaching property inspection is lacked; the device only collects the sulfur dioxide tail gas and does not process the sulfur dioxide tail gas.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide a sulfur dioxide prepare with the improvement device of nature experiment, have device integration, the reagent quantity is few, paper ring experimental phenomenon is obvious, make sulfur dioxide tail gas handle advantages such as simple and convenient, friendly to the environment.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an improvement device of sulfur dioxide's preparation and nature experiment, includes three-necked flask, syringe, glass pipe and balloon, be equipped with the rubber buffer on one side bottleneck of three-necked flask and the middle bottleneck respectively, the cover is equipped with the balloon on the opposite side bottleneck of three-necked flask, the syringe is inserted and is established on the rubber plug that is located one side and the syringe needle of syringe runs through the rubber buffer and stretch into in the three-necked flask, the one end of glass pipe is inserted and is established in the rubber buffer that is located the middle, and the other end of glass pipe stretches into in the three-necked flask, the interval is equipped with blue litmus paper ring, fuchsin paper ring and acid potassium permanganate solution paper ring on the glass pipe.

The balloon is fixed on the other side of the three-neck flask through a rubber band in a sealing way.

The blue litmus test paper ring, the fuchsin test paper ring and the potassium permanganate solution test paper ring are sequentially sleeved on the outer wall of the glass tube from bottom to top.

And a concentrated sulfuric acid solution with the mass fraction of 70% is filled in the three-neck flask.

The injector is filled with concentrated sodium hydroxide solution with the mass fraction of 40%.

Sodium sulfite powder is filled in the balloon.

The utility model has the advantages that: the device integrates sulfur dioxide preparation and property inspection, achieves the effect that the reagent dosage is less but the paper ring phenomenon is obvious, simultaneously increases a sulfur dioxide bleaching property inspection device, further perfects sulfur dioxide property inspection experiment, and the device makes tail gas treatment simple and convenient, is friendly to the environment, and accords with green chemistry theory.

Drawings

FIG. 1 is a schematic structural diagram of an improved apparatus proposed by Wu Mingsheng et al;

FIG. 2 is a schematic structural diagram of an improved apparatus proposed in 2011 of Zhejiang high-quality lessons;

fig. 3 is a schematic structural diagram of the present invention.

In the figure: three-neck flask 1, syringe 2, glass tube 3, balloon 4, rubber stopper 5, blue litmus paper test ring 6, fuchsin paper test ring 7, potassium permanganate solution paper test ring 8, flask 111, separating funnel 112, A test tube 113, B test tube 114, C test tube 115, D test tube 116, beaker 117, air duct 118, A rubber stopper 119, E test tube 120, B rubber stopper 121, A glass tube 122, purple litmus paper test ring 123, A potassium permanganate paper test ring 124, sodium hydroxide phenolphthalein paper test ring 125, A syringe 126 and A balloon 127.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 3, an improved device for sulfur dioxide preparation and property experiments comprises a three-neck flask 1, an injector 2, a glass tube 3 and a balloon 4, wherein a concentrated sulfuric acid solution with a mass fraction of 70% is filled in the three-neck flask 1, a concentrated sodium hydroxide solution with a mass fraction of 40% is filled in the injector 2, and sodium sulfite powder is filled in the balloon 4.

Be equipped with rubber buffer 5 on one side bottleneck of three-necked flask 1 and the middle bottleneck respectively, the cover is equipped with balloon 4 on the opposite side bottleneck of three-necked flask 1, balloon 4 passes through the rubber band sealed fixation on the opposite side bottleneck of three-necked flask 1, syringe 2 is inserted and is established on the rubber buffer 5 that is located one side and syringe 2's syringe needle runs through rubber buffer 5 and stretches into in three-necked flask 1, the one end of glass pipe 3 is inserted and is established in the rubber buffer 5 that is located the middle, and the other end of glass pipe 3 stretches into in three-necked flask 1, the interval is equipped with blue litmus paper test ring 6, fuchsia test paper ring 7 and acid potassium permanganate solution test paper ring 8 on the glass pipe 3, blue litmus paper test ring 6, fuchsia test paper ring 7 and potassium permanganate solution test paper ring 8 are established the outer wall of glass pipe 3 from bottom to top in proper order.

Adopt the utility model discloses carry out the sulfur dioxide prepare with the experimentation and the phenomenon of nature experiment do:

(1) erect balloon 4, make sodium sulfite powder get into three-necked flask 1 smoothly and fully react with concentrated sulfuric acid, after reacting a period of time, can observe that the color change of three paper ring is in proper order: the blue litmus test paper ring 6 becomes red, the red magenta test paper ring 7 fades, the mauve potassium permanganate solution test paper ring 8 fades, and the volume of the balloon 4 becomes larger, which indicates that more sulfur dioxide is accumulated in the balloon 4. The reaction principle of sodium sulfite and concentrated sulfuric acid is as follows: na (Na)₂SO₃+H₂SO₄(concentrated) Na ═ Na₂SO₄+H₂O+SO₂And the property experiment of the sulfur dioxide is mainly used for testing the acidity, bleaching property and reducibility of the sulfur dioxide, and the partial reaction principle is as follows:

(acidic); 5SO₂+2MnO₄ ^-+2H₂O＝5SO₄ ^2-+2Mn²⁺+4H⁺(reducing property).

(2) The concentrated sodium hydroxide solution in the syringe 2 is injected into the three-necked flask 1, and after a certain period of reaction, the volume of the balloon 4 becomes smaller, which indicates that the sulfur dioxide in the balloon 4 is absorbed by the concentrated sodium hydroxide solution.

The above experimental phenomena prove that the improved device for preparing sulfur dioxide and performing property experiments achieves expected effects.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides an improvement device of preparation and nature experiment of sulfur dioxide, includes three-neck flask (1), syringe (2), glass pipe (3) and balloon (4), its characterized in that: be equipped with rubber buffer (5) on one side bottleneck and the middle bottleneck of three-necked flask (1) respectively, the cover is equipped with balloon (4) on the opposite side bottleneck of three-necked flask (1), syringe (2) are inserted and are established on rubber buffer (5) that are located one side and the syringe needle of syringe (2) runs through rubber buffer (5) and stretch into in three-necked flask (1), the one end of glass pipe (3) is inserted and is established in rubber buffer (5) that are located in the middle of, and the other end of glass pipe (3) stretches into in three-necked flask (1), the interval is equipped with blue litmus paper test ring (6), fuchsia test paper ring (7) and acid potassium permanganate solution test paper ring (8) on glass pipe (3).

2. The improved apparatus for sulfur dioxide production and property testing as claimed in claim 1, wherein: the balloon (4) is fixed on the other side of the three-neck flask (1) through a rubber band in a sealing way.

3. The improved apparatus for sulfur dioxide production and property testing as claimed in claim 1, wherein: the blue litmus paper test ring (6), the fuchsin paper test ring (7) and the potassium permanganate solution paper test ring (8) are sequentially sleeved on the outer wall of the glass tube (3) from bottom to top.

4. The improved apparatus for sulfur dioxide production and property testing as claimed in claim 1, wherein: the three-neck flask (1) is filled with a concentrated sulfuric acid solution with the mass fraction of 70%.

5. The improved apparatus for sulfur dioxide production and property testing as claimed in claim 1, wherein: the injector (2) is filled with concentrated sodium hydroxide solution with the mass fraction of 40%.

6. The improved apparatus for sulfur dioxide production and property testing as claimed in claim 1, wherein: sodium sulfite powder is filled in the balloon (4).