Iodine clock reaction experiment teaching aid

Abstract

This utility model discloses an iodine clock reaction experimental teaching aid, including a shell, a first liquid storage chamber, a second liquid storage chamber, a third liquid storage chamber, a push rod, a pressure plate, a first sealing plug, a second sealing plug, and a drain valve. This utility model stores different solutions for the iodine clock reaction separately, a process that can be completed before class. Due to its integrated closed structure, it is more convenient to carry, and in class, only a single press is needed to mix the different solutions, making operation convenient. This process also allows student participation, preventing spills and reducing the difficulty for students. The interactive design helps stimulate students' interest in chemistry and their desire to explore. This teaching aid combines the iodine clock reaction with a clock design, integrating chemical knowledge with fun. Its novel structure and strong intuitiveness facilitate students' observation of the iodine clock reaction process and recording the reaction time, helping to deepen student memory and improve teaching quality. The clock is detachable, and the liquid can be drained through the drain valve for easy maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of chemical teaching technology, specifically relating to an iodine clock reaction experimental teaching aid. Background Technology

[0002] The iodine clock reaction is a classic chemical reaction. By mixing a solution containing potassium iodate, hydrogen peroxide, starch, sulfuric acid, malonic acid, and manganese sulfate, a series of redox reactions are triggered, resulting in a periodic change in the solution's color over time. The iodine clock reaction is highly engaging due to its visually striking color changes and time-dependent nature, making it a popular and interesting component in chemistry teaching. However, preparing the iodine clock reaction solution is relatively complex. For short class periods, different solutions need to be prepared in advance. The teacher mixes the different solutions in class for students to observe. This method has the following drawbacks: 1. The three solutions need to be carried separately, along with empty bottles for demonstration, leading to inconvenience due to the large number of solutions required; 2. Students may spill solutions during the experiment, affecting the experimental results; 3. Traditional classroom experimental teaching needs a breakthrough to enhance its effectiveness. Therefore, it is essential to develop a portable, easy-to-operate, spill-resistant, and novel iodine clock reaction experimental teaching aid that is beneficial for classroom teaching. Utility Model Content

[0003] To solve the above technical problems, the purpose of this utility model is to provide an iodine clock reaction experimental teaching tool.

[0004] The purpose of this utility model is achieved as follows: It includes an outer shell, a first liquid storage chamber, a second liquid storage chamber, a third liquid storage chamber, a top rod, a pressure plate, a first sealing plug, a second sealing plug, and a drain valve. The outer shell extends through the front and rear and has an embedding hole. The outer shell is a closed structure and made of transparent material. Several partitions are provided in the upper part of the outer shell, forming independent and closed first, second, and third liquid storage chambers. Each of the first, second, and third liquid storage chambers has a liquid inlet at its rear, and each inlet is fitted with a first sealing plug. A top rod extends longitudinally through each of the first, second, and third liquid storage chambers. The upper ends of the three top rods are connected to the bottom of the pressure plate. A spring is fitted onto the top rod between the pressure plate and the top of the outer shell. A second sealing plug is provided at the lower end of each top rod, sealing the liquid outlet at the bottom of the liquid storage chamber. A drain valve is provided at the drain outlet at the bottom of the outer shell.

[0005] The first sealing plug and the second sealing plug can be common rubber plugs in the field, such as rubber plugs or silicone plugs, as long as they can seal and prevent leakage.

[0006] Preferably, the first, second, and third liquid storage tanks are arranged in a row, which makes it easier for students to observe the solutions in the three tanks.

[0007] Preferably, the bottoms of the first, second, and third liquid storage tanks are all frustoconical to facilitate liquid discharge.

[0008] Preferably, the watch is embedded in the embedding hole. The watch can be a common electronic watch or mechanical watch in the art, such as a mechanical stopwatch. As for the shape of the embedding hole, it can be determined according to the shape of the watch. For example, for a mechanical stopwatch, the embedding hole can be a round hole.

[0009] Preferably, the upper end of the spring is fixedly connected to the pressure plate, and the lower end of the spring is fixedly connected to the top of the outer shell, so that the upper and lower ends of the spring are fixed and slippage is prevented.

[0010] The beneficial effects of this invention are as follows: This invention stores different solutions for the iodine clock reaction separately, a process that can be completed before class. Due to its integrated, sealed structure, it is more convenient to carry, and in class, mixing different solutions requires only a single press, making it easy to operate. This process also allows student participation, preventing spills and reducing the difficulty for students. The interactive design helps stimulate students' interest in and desire to explore chemistry. This teaching aid combines the iodine clock reaction with a clock design, integrating chemical knowledge with fun. Its novel structure and strong intuitiveness facilitate students' observation of the iodine clock reaction process and recording of reaction time, helping to deepen student memory and improve teaching quality. The clock is detachable, and liquid can be drained through the drain valve for easy maintenance. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 for Figure 1 A schematic diagram of the structure in use after the middle pressure plate is pressed down;

[0013] In the diagram: 1-outer shell, 2-first liquid storage chamber, 3-second liquid storage chamber, 4-third liquid storage chamber, 5-top rod, 6-pressure plate, 7-first sealing plug, 8-second sealing plug, 9-drain valve, 10-embedded hole, 11-spring, 12-gauge. Detailed Implementation

[0014] The present invention will be further described below with reference to the embodiments and accompanying drawings, but this does not limit the present invention in any way. Any changes or substitutions made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0015] Example 1

[0016] As attached Figures 1-2As shown, the iodine clock reaction experimental teaching aid in this embodiment includes a shell 1, a first liquid storage chamber 2, a second liquid storage chamber 3, a third liquid storage chamber 4, a push rod 5, a pressure plate 6, a first sealing plug 7, a second sealing plug 8, and a drain valve 9. The shell 1 extends through the front and back and has an insertion hole 10. The shell 1 is a closed structure and is made of transparent acrylic material. The upper part of the shell 1 has several partitions, forming independent and closed first liquid storage chambers 2, 3, and 4. The first liquid storage chambers 2, 3, and 4 are arranged in a row, and the bottoms of the first, second, and third liquid storage chambers 2, 3, and 4 are all frustoconical. The first liquid storage tank 2, the second liquid storage tank 3, and the third liquid storage tank 4 are provided with liquid injection ports at their rear ends. Each liquid injection port is equipped with a first sealing plug 7. The first liquid storage tank 2, the second liquid storage tank 3, and the third liquid storage tank 4 are each provided with a top rod 5 running longitudinally through them. The upper ends of the three top rods 5 are all connected to the bottom of the pressure plate 6. A spring 11 is sleeved on the top rod 5 between the pressure plate 6 and the top of the outer shell 1. The upper end of the spring 11 is fixed to the pressure plate 6, and the lower end of the spring 11 is fixed to the top of the outer shell 1. The lower end of the top rod 5 is provided with a second sealing plug 8, which blocks the liquid outlet at the bottom of the liquid storage tank. The bottom drain port of the outer shell 1 is provided with a drain valve 9. A mechanical stopwatch is embedded in the embedding hole 10.

[0017] Using the iodine clock reaction experimental teaching aid of this embodiment, take 102.5 ml of 30% H2O2 and dilute it with distilled water to 250 ml to obtain solution A; take 10.7 g of KIO3, add 10 ml of dilute H2SO4, and dilute it with distilled water to 250 ml to obtain solution B; take 0.075 g of starch, add 2 ml of distilled water and stir well, add 100 ml of boiling water, cool, add 3.9 g of malonic acid and 0.845 g of MnSO4, and dilute it with distilled water to 250 ml to obtain solution C; inject solution A into the first storage chamber 2, solution B into the second storage chamber 3, and solution C into the third storage chamber 4; during the experiment, the three solutions are mixed and react in the outer shell 1; the mechanical stopwatch can be pressed to start the timing, and students record the time of occurrence according to the reaction process.

[0018] The working principle and process of this utility model are as follows: Prepare the solution required for the iodine clock reaction in advance, remove the first sealing plug 7, and inject different solutions into different storage chambers through the injection port; the first sealing plug 7 can be installed to prevent leakage; during teaching demonstration, press down the pressure plate 6, and push down the second sealing plugs 8 corresponding to all storage chambers through the top rod 5, so that the bottom outlets of all storage chambers are opened, and the solution enters the outer shell 1; after the solution is drained, release the pressure plate 6, and the second sealing plugs 8 move upward and reset under the action of the spring 11, sealing the outlet of the storage chamber; the outer shell 1 can be shaken to fully mix the solution inside the outer shell 1; students can observe the iodine clock reaction process through the transparent outer shell 1; after use, open the drain valve 9 to drain the liquid inside the outer shell 1.

Claims

1. An iodine clock reaction experimental teaching aid, comprising a shell (1), a first liquid storage chamber (2), a second liquid storage chamber (3), a third liquid storage chamber (4), a push rod (5), a pressure plate (6), a first sealing plug (7), a second sealing plug (8), and a drain valve (9), characterized in that... The outer shell (1) is through the front and back and has an embedded hole (10). The outer shell (1) is a closed structure and is made of transparent material. The upper part of the outer shell (1) is provided with several partitions to form a first liquid storage chamber (2), a second liquid storage chamber (3), and a third liquid storage chamber (4) that are independent and closed to each other. The first liquid storage chamber (2), the second liquid storage chamber (3), and the third liquid storage chamber (4) are provided with injection ports at the rear. Each injection port is equipped with a first sealing plug (7). The first liquid storage chamber (2), the second liquid storage chamber (3), and the third liquid storage chamber (4) are respectively provided with a top rod (5) through the front. The upper ends of the three top rods (5) are connected to the bottom of the pressure plate (6). The top rod (5) between the pressure plate (6) and the top of the outer shell (1) is fitted with a spring (11). The lower end of the top rod (5) is provided with a second sealing plug (8), and the second sealing plug (8) seals the liquid outlet at the bottom of the liquid storage chamber. The bottom drain port of the outer shell (1) is provided with a drain valve (9).

2. The iodine clock reaction experimental teaching aid according to claim 1, characterized in that... The first liquid storage tank (2), the second liquid storage tank (3), and the third liquid storage tank (4) are arranged in a row.

3. The iodine clock reaction experimental teaching aid according to claim 1, characterized in that... The bottoms of the first liquid storage tank (2), the second liquid storage tank (3), and the third liquid storage tank (4) are all frustoconical.

4. The iodine clock reaction experimental teaching aid according to claim 1, characterized in that... The table is embedded in the embedding hole (10).

5. The iodine clock reaction experimental teaching aid according to claim 1, characterized in that... The upper end of the spring (11) is fixedly connected to the pressure plate (6), and the lower end of the spring (11) is fixedly connected to the top of the outer shell (1).

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