Colloid Tyndall effect teaching demonstrator

Abstract

The utility model discloses a colloid Tyndall effect teaching demonstrator, which is not limited by places and has various types, and comprises a bottom plate, a laser pen bracket is arranged on the bottom plate, and a laser pen is arranged on the laser pen bracket; a test tube bottle bracket, a crystal ball bracket, a white smoke observation bottle, a powder observation bottle and a fixing frame are sequentially arranged on the bottom plate; a test tube bottle is clamped on the test tube bottle bracket, a crystal ball is arranged on the crystal ball bracket, and a water mist generator is arranged on the fixed frame; the test tube bottle, the crystal ball, the white smoke observation bottle and the powder observation bottle are positioned on a light path of laser irradiated by the laser pen; the overall structure is compact, the weight is light, carrying is convenient, and operation is easy; the method is flexible, convenient, wide in application type, time-saving and trouble-saving; the teaching environment is prevented from being polluted; flying dust is avoided, the principle of'green chemistry 'is met, and mounting and taking are convenient; various types of colloid media can be demonstrated, so that experiment contents and steps are more complete, and students can understand and participate in the experiment visually.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of test devices, specifically to a kind of colloidal Tyndall effect teaching demonstrator for demonstrating chemical phenomenon. BACKGROUND

[0002] Colloidal Tyndall effect is an important phenomenon in chemistry, which refers to a bright light path observed from the side when light passes through a colloid due to the scattering of light by colloidal particles. This phenomenon has important teaching significance in chemistry teaching, as it can visually demonstrate the difference between colloids and solutions, helping students understand the properties and characteristics of colloids and deepen their understanding of the concept of dispersion system.

[0003] Chemistry is a basic discipline, and chemistry requires experimental procedures to consolidate students' theoretical knowledge. Teachers should conduct reasonable teaching in the teaching process, gradually transitioning from the past theory-oriented teaching methods to guiding students to conduct experimental operations. However, the use of traditional experimental equipment in the teaching process can lead to outdated experimental demonstrations, failing to stimulate students' interest in experiments and chemistry, and not fully utilizing the role of teaching aids. The demonstration experiment of colloidal Tyndall effect is the first demonstration experiment for students studying chemistry in high school, so it is very important and can stimulate students' interest in learning chemistry. However, in traditional classroom demonstrations, only the iron hydroxide colloid, a liquid sol, is demonstrated, while the textbook also introduces various colloids, such as cloud, fog, smoke, and various gas sols and solid sols such as colored glass. Due to limitations such as space, these cannot be demonstrated in the classroom, making it difficult for students to understand.

[0004] Therefore, researching and developing a teaching aid that can effectively demonstrate various colloidal Tyndall effects in the classroom is of great significance for improving the effectiveness of chemistry teaching and stimulating students' interest in learning. SUMMARY

[0005] The utility model aims at providing a colloidal Tyndall effect teaching demonstrator that is not limited by location and has a variety of types.

[0006] The utility model is implemented by the following technical scheme, a colloidal Tyndall effect teaching demonstrator, including bottom plate, be equipped with laser pointer support on the bottom plate, the laser pointer support is installed with detachable laser pointer, the bottom plate is equipped with test tube bottle support, crystal ball bracket, white smoke observation bottle, powder observation bottle, fixing frame in proper order;

[0007] The test tube bottle support holds test tube bottle, the crystal ball bracket is equipped with crystal ball, the fixing frame is equipped with water mist generator that can produce continuous water mist;

[0008] The test tube bottle, the crystal ball, the white smoke observation bottle and the powder observation bottle are located on the light path of the laser emitted by the laser pen; the test tube bottle, the white smoke observation bottle and the powder observation bottle are transparent.

[0009] The utility model discloses a crystal ball bracket, which is convenient for replacing experimental medium to make contrast experiment, and comprises a rotating base, a T-shaped bracket arranged on the rotating base, white crystal balls and tea crystal balls arranged at two ends of the T-shaped bracket, and the white crystal balls and the tea crystal balls are located on the light path of the laser emitted by the laser pen by rotating the rotating base to drive the T-shaped bracket to deflect, and the white crystal balls and the tea crystal balls are alternately located at the end closest to the laser pen (i.e. the side that is first irradiated) to be used for contrast test.

[0010] The white smoke observation bottle comprises an observation bottle cover arranged on a bottom plate and having an opening upward, and an observation bottle body movably connected to the observation bottle cover, and a detachable combustion spoon is arranged in the observation bottle cover, and a mosquito-repellent tablet is arranged in the combustion spoon as a white smoke generator, so that the white smoke generator fills the closed space with white smoke to form an aerosol, the aerosol has a large concentration of particulate matters, the test effect is good, and the white smoke is prevented from being emitted into a classroom to pollute the air.

[0011] White smoke is an aerosol formed by extremely small solid particles in the air and belongs to a kind of colloid. When strong light (such as laser) irradiates the colloid, scattered light can be observed to form a bright light path, which is the Tyndall effect.

[0012] The powder observation bottle is fixed on the bottom plate by a fixing clamping bracket arranged at the bottom of the powder observation bottle, so that the powder observation bottle can be pulled out and shaken to form dust and aerosol during test demonstration.

[0013] The powder observation bottle is ≥2, and the powder observation bottle contains flour, fine soil and other powder-shaped solids.

[0014] The laser pen support is a telescopic support capable of changing the height of the laser pen, adjusting the horizontal height of the laser and deflecting the angle to irradiate continuous water mist sprayed by the water mist generator; the test tube bottle is provided with a test tube cover, and can be heated and shaken to contain copper sulfate solution, boiling water to make iron hydroxide colloid, or diluted milk, soy milk and other liquid sols.

[0015] With the above technical scheme, the present application realizes the purpose, has compact overall structure, light weight, convenient carrying, simple operation, the laser pen is installed on the laser pen support and can adjust the height and angle to cooperate with different experimental containers, can also be disassembled and used, is flexible and convenient, the test tube bottle support holds the test tube in the height range of the laser irradiated by the laser pen, can be taken off and shaken, can also heat the bottom to make solution reagent, to complete the comparison test of solution and liquid sol, is suitable for a wide range of types, drives the T-shaped bracket to rotate different types of crystal balls to the light path of the laser irradiated by the laser pen through the rotating base, saves time and effort, seals the white smoke generated in the burning spoon in the white smoke observation bottle, avoids pollution of the teaching environment, the burning spoon can be disassembled and poured, is environment-friendly, seals the powder solid in the powder observation bottle, avoids dust, meets the "green chemistry" principle, and the powder observation bottle can be connected to the bottom plate through the fixed clamping bracket, is convenient to use, can demonstrate a variety of colloidal media, makes the experimental content and steps more complete, and is convenient for students to understand and participate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the present application;

[0017] Figure 2 is Figure 1 is an enlarged schematic view of the structure at A in Fig.

[0018] In the figure: 1. bottom plate, 2. laser pen support, 3. laser pen, 4. test tube bottle, 5. test tube bottle cover, 6. test tube bottle support, 7. white crystal ball, 8. tea crystal ball, 9. crystal ball bracket, 10. white smoke observation bottle, 11. observation bottle cover, 12. observation bottle body, 13. burning spoon, 14. fixed clamping bracket, 15. powder observation bottle, 16. water mist generator, 17. fixed frame, 18. mosquito killing tablet, 91. rotating base, 92. T-shaped bracket. DETAILED DESCRIPTION

[0019] The present application will be further described below in combination with the drawings and examples.

[0020] From Figure 1 , Figure 2 It can be seen that a colloidal Tyndall effect teaching demonstrator comprises a bottom plate 1, a laser pen support 2 is arranged on the bottom plate 1, a detachable laser pen 3 is installed on the laser pen support 2, a test tube bottle support 6, a crystal ball bracket 9, a white smoke observation bottle 10, a powder observation bottle 15 and a fixed frame 17 are sequentially arranged on the bottom plate 1;

[0021] The test tube bottle support 6 holds a test tube bottle 4, the crystal ball bracket 9 is provided with crystal balls, and the fixed frame 17 is provided with a water mist generator 16 capable of generating continuous water mist (a pressurized spray pot is adopted in the embodiment);

[0022] The test tube bottle 4, the crystal ball, the white smoke observation bottle 10 and the powder observation bottle 15 are located on the light path of the laser emitted by the laser pen 3; the test tube bottle 4, the white smoke observation bottle 10 and the powder observation bottle 15 are transparent in the bottle body.

[0023] The utility model discloses in order to facilitate the replacement experiment medium to do contrast experiment, the crystal ball bracket 9 including rotating base 91, be located on rotating base 91 on T-shaped bracket 92, the both ends of T-shaped bracket 92 are equipped with white crystal ball 7, tea crystal ball 8 respectively, through the rotation rotating base 91 drive T-shaped bracket 92 angular deflection occurs, make white crystal ball 7, tea crystal ball 8 be in the light path of the laser emitted by laser pen 3, and alternate position is closest to one end of laser pen 3 (i.e. the first acceptance irradiation side), for contrast test.

[0024] The utility model discloses white smoke observation bottle 10 including being located on bottom plate 1 and the observation bottle bottle cover 11 that opens upwards, the bottle cover is movably connected observation bottle bottle body 12, the observation bottle bottle cover 11 is equipped with detachable combustion spoon 13 in, places the mosquito-repellent tablet 18 as white smoke generator in combustion spoon 13, makes it in the closed space full white smoke formation aerosol, the particulate matter concentration in aerosol is big, and the test effect is good, and white smoke is avoided to spread to the classroom and pollutes the air.

[0025] White smoke is the aerosol formed by very small solid particles in the air, which belongs to a kind of colloid.When strong light (such as laser) irradiates this colloid, scattered light can be observed, forming a bright light path, which is the Tyndall effect.

[0026] The utility model discloses powder observation bottle 15 by the fixed card tray 14 of its bottle bottom installation fixed on bottom plate 1, convenient for test demonstration, pull out powder observation bottle 15 and shake, form dust raising aerosol.

[0027] The utility model discloses laser pen support 2 is telescopic support that can change the height of laser pen 3, can adjust the horizontal height of laser emission, and can be deflected angle, to irradiate the continuous water mist sprayed by water mist generator 16;The test tube bottle 4 is equipped with test tube bottle cover 5, can heat, shake, to be used for containing copper sulfate solution, or containing boiling water to make iron hydroxide colloid, or containing diluted milk, soy milk and a variety of liquid sols.

[0028] The use steps and principles of the utility model are as follows:

[0029] (1) the observation and comparison of liquid sol

[0030] a. install laser pen 3 on laser pen support 2 and wait for use;

[0031] b. Take off the (transparent) test tube 4 from the test tube holder 6, open the test tube cover 5, pour copper sulfate solution into the test tube 4; adjust the laser pen 3 to the appropriate height, open the laser pen 3 to irradiate the test tube 4, and there is no Tyndall effect phenomenon;

[0032] c. Pour out the copper sulfate solution in the test tube 4, wash it, fill it with boiling water, drop in saturated ferric chloride solution, prepare iron hydroxide colloid, and use the laser pen 3 to irradiate the test tube 4, and there is Tyndall effect phenomenon;

[0033] d. Pour out the iron hydroxide colloid in the test tube 4, wash it, fill it with distilled water, and use the laser pen 3 to irradiate the test tube 4, and there is no Tyndall effect phenomenon;

[0034] e. Drop milk into the distilled water in the test tube 4, take off the test tube 4 and cover it with the test tube cover 5, shake it up, put it on the test tube holder 6, and use the laser pen 3 to irradiate the test tube 4, and there is Tyndall effect phenomenon;

[0035] f. Pour out the diluted milk in the test tube 4, wash it, fill it with distilled water, drop in soybean milk, take off the test tube 4 and cover it with the test tube cover 5, shake it up, put it on the test tube holder 6, and use the laser pen 3 to irradiate the test tube 4, and there is Tyndall effect phenomenon;

[0036] g. Pour out the diluted soybean milk in the test tube 4 again, wash it, fill it with distilled water, add an appropriate amount of flour, take off the test tube 4 and cover it with the test tube cover 5, shake it up, put it on the test tube holder 6, and use the laser pen 3 to irradiate the test tube 4, and there is Tyndall effect phenomenon;

[0037] (2) Observation and comparison of solid sol

[0038] a. Take off the test tube 4 from the test tube holder 6;

[0039] b. Rotate the rotating base 91 to drive the T-shaped bracket 92 to deflect, so that the white crystal ball 7 is in the light path of the laser irradiated by the laser pen 3, and is located at one end close to the laser pen 3, and the white crystal ball 7 (transparent white crystal without impurities, not a colloid) is irradiated by the laser pen 3, and there is no Tyndall effect phenomenon;

[0040] c. Rotate the rotating base 91 to drive the T-shaped bracket 92 to deflect, so that the tea crystal ball 8 is in the light path of the laser irradiated by the laser pen 3, and is located at one end close to the laser pen 3, and the tea crystal ball 8 (which belongs to colloid) is irradiated by the laser pen 3, and there is Tyndall effect phenomenon;

[0041] (3) Observation and comparison of aerosol

[0042] a. Rotating the rotating base 91 drives the T-shaped bracket 92 to deflect, so that the white crystal ball 7 and the tea crystal ball 8 are located on both sides of the light path of the laser emitted by the laser pen 3, so that the laser can pass through the white crystal ball 7 and the tea crystal ball 8;

[0043] b. Remove the observation bottle body 12 of the white smoke observation bottle 10 (transparent), ignite the mosquito-repelling tablet 18 in the burning spoon 13 in the observation bottle cover 11, quickly install the observation bottle body 12, and use the laser pen 3 to irradiate the white smoke in the white smoke observation bottle 10, so that the Tyndall effect phenomenon appears;

[0044] c. Pull out the powder observation bottle 15 from the fixed clamping bracket 14, and respectively fill a small amount of flour and fine soil into each (dry inside) powder observation bottle 15, cover the cover and shake up and down or upside down, and immediately insert the powder observation bottle 15 into the fixed clamping bracket 14 (or remove the laser pen 3) when the dust is visible, and use the laser pen 3 to irradiate, so that the Tyndall effect phenomenon appears;

[0045] d. Fill the water mist generator 16 with an appropriate amount of water, so that it sprays continuous water mist to one side of the bottom plate 1, at this time (remove the laser pen 3 or) adjust the laser pen support 2 to deflect the laser pen 3 by a certain angle, and irradiate the water mist, so that the Tyndall effect phenomenon appears.

[0046] The white smoke observation bottle 10, the powder observation bottle 15 and the fixed clamping bracket 14 in the utility model can use waste beverage bottles with transparent bottle bodies, and students can participate in the production, so that waste is utilized and the utility model is more green and environmentally friendly.

Claims

1. A colloidal demonstration of the Tyndall effect comprising a base plate, characterised in that The bottom plate is provided with a laser pointer support, and a laser pointer is installed on the laser pointer support; the bottom plate is sequentially provided with a test tube bottle support, a crystal ball bracket, a white smoke observation bottle, a powder observation bottle and a fixing frame; the test tube bottle support clamps a test tube bottle, the crystal ball bracket is provided with a crystal ball, and the fixing frame is provided with a water mist generator; the test tube bottle, the crystal ball, the white smoke observation bottle and the powder observation bottle are located on the light path of the laser emitted by the laser pointer.

2. The colloidal demonstration of the effect of the light scattering on the colloidal particles according to claim 1, characterized in that The crystal ball bracket comprises a rotating base and a T-shaped bracket provided on the rotating base, and the T-shaped bracket is provided with a white crystal ball and a tea crystal ball at two ends thereof.

3. The colloidal demonstration of the D'Albama effect according to claim 1, characterized in that The white smoke observation bottle comprises an observation bottle cover provided on the bottom plate and having an opening upward, and an observation bottle body movably connected to the observation bottle cover, and a detachable combustion spoon is arranged in the observation bottle cover.

4. The colloidal demonstration of the D'Alambert effect according to claim 2, characterized in that The white smoke observation bottle comprises an observation bottle cover provided on the bottom plate and having an opening upward, and an observation bottle body movably connected to the observation bottle cover, and a detachable combustion spoon is arranged in the observation bottle cover.

5. A colloidal demonstration of the Tyndall effect according to claim 1 or 2 or 3 or 4, characterized in that The powder observation bottle is fixed to the bottom plate by a fixing clamping bracket arranged at the bottom of the powder observation bottle.

6. The colloidal demonstration of the Tyndall effect according to claim 1 or 2 or 3 or 4, characterized in that The laser pointer support is a telescopic support and can be deflected, and the test tube bottle is provided with a test tube bottle cover.

7. The colloidal demonstration of the D'Albama effect according to claim 5, characterized in that The laser pointer support is a telescopic support and can be deflected, and the test tube bottle is provided with a test tube bottle cover.

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