A chemical experimental device for testing the properties of carbon dioxide gas

Abstract

The utility model discloses a chemical experiment device of inspecting carbon dioxide gas property belongs to chemical experiment instrument field, including round bottom flask, glass long guide pipe, glass short guide pipe, enablep generator, syringe, and beaker, the round bottom flask fixed inverted installation is on iron stand, the round bottom flask is passed through glass long guide pipe with the beaker intercommunication, the round bottom flask is passed through glass short guide pipe with enablep generator intercommunication, and the syringe is passed through infusion hose with the round bottom flask intercommunication, and the experimental device is by enablep generator and fountain device combination and is formed, through the experiment, will complete carbon dioxide preparation, collection, check full, chemical property verification, no phenomenon reaction inquiry, carbonate inspection etc. Multiple experiments, realize the purpose of a set of device multiple purposes.

Description

Technical Field

[0001] This utility model relates to the field of chemical experimental instruments, and in particular to a chemical experimental device for testing the properties of carbon dioxide gas. Background Technology

[0002] Chemical reactions are the most fascinating aspect of chemistry. Whether you're a professional chemical researcher or someone who has never done a chemical experiment before, you'll find the various changes that occur during a chemical reaction exciting and delightful, thus generating a strong desire to learn and a thirst for hands-on experience. In particular, in secondary school chemistry teaching, demonstrating chemical knowledge from textbooks through experiments not only helps students understand chemical concepts but also helps stimulate their curiosity.

[0003] However, in the current teaching of CO2 properties in secondary school chemistry, there are very few related combined experiments. The main reason is that the textbook-based teaching model divides the systematic knowledge of CO2 properties into many chapters, making it difficult for students to have an overall understanding of the knowledge taught, which reduces the interest and generalizability of the experiments. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the technical problem to be solved by this utility model is to propose a chemical experimental device for testing the properties of carbon dioxide gas, which can test multiple properties of CO2 as a whole.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model provides a chemical experimental apparatus for testing the properties of carbon dioxide gas, comprising a round-bottom flask, a long glass tube, a short glass tube, a Kipp generator, a syringe, and a beaker; the round-bottom flask is fixedly and invertedly mounted on an iron stand, the round-bottom flask is connected to the beaker through the long glass tube, the round-bottom flask is connected to the Kipp generator through the short glass tube, and the syringe is connected to the round-bottom flask through an infusion tubing.

[0007] The preferred technical solution of this utility model is that both the long glass conduit and the short glass conduit are provided with a connecting hose at one end, the connecting hose is provided with a water-stopping clamp, and the infusion hose is provided with a water-stopping clamp.

[0008] The beneficial effects of this utility model are as follows:

[0009] This utility model provides a chemical experimental device for testing the properties of carbon dioxide gas. The experimental device is composed of a Kipp generator and a fountain device. Through experiments, it can complete multiple experiments such as carbon dioxide production, collection, testing for fullness, verification of chemical properties, investigation of reactions without phenomena, and carbonate testing, thus achieving the purpose of one device for multiple uses. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of the chemical experimental apparatus for testing the properties of carbon dioxide gas provided in a specific embodiment of this utility model;

[0011] In the picture:

[0012] 1. Round-bottom flask; 2. Long glass tube; 3. Short glass tube; 4. Kipp generator; 5. Syringe; 6. Beaker; 7. Connecting hose; 8. Stop clamp. Detailed Implementation

[0013] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0014] As shown in the figure, this embodiment provides a chemical experimental apparatus for testing the properties of carbon dioxide gas, including a round-bottom flask 1, a long glass tube 2, a short glass tube 3, a Kipp generator 4, a syringe 5, and a beaker 6. The round-bottom flask 1 is fixedly and invertedly mounted on an iron stand. The round-bottom flask 1 is connected to the beaker 6 via the long glass tube 2, and the round-bottom flask 1 is connected to the Kipp generator 4 via the short glass tube 3. The syringe 5 is connected to the round-bottom flask 1 via an infusion tubing. Both the long glass tube 2 and the short glass tube 3 have a connecting tubing 7 at one end, and the connecting tubing 7 is equipped with a water-stop clamp 8. The infusion tubing is also equipped with a water-stop clamp 8. To ensure that the round-bottom flask 1 is filled with carbon dioxide, the long glass tube 2 must extend to the bottom of the round-bottom flask 1.

[0015] The structure of this utility model will be further understood in conjunction with the experimental process below. The specific experimental process is as follows:

[0016] 1. Check the airtightness of the device: Close the long tube and Kipp generator 4, install syringe 5, slowly push the piston, and after releasing it, the piston will spring back to its original position, indicating that the airtightness is good. Close the stop clamp 8 of syringe 5, remove syringe 5, and open the stop clamp 8 of the glass long tube 2;

[0017] 2. Carbon dioxide gas detection, collection, filling test, and verification of some chemical properties: Place beaker 6 containing limewater below long glass tube 2, ensuring the end of tube 2 is submerged in the limewater. Open the Kipp stopcock and observe the phenomenon (after about half a minute). The limewater turns cloudy; turn off the Kipp generator 4. The cloudiness proves that the gas produced is carbon dioxide. Since carbon dioxide gas enters through short glass tube 3 and exits through long glass tube 2 in the flask, entering the limewater in beaker 6 below, the cloudiness of the limewater indicates that the round-bottom flask 1 is full of carbon dioxide. Simultaneously, the cloudiness verifies the chemical property that carbon dioxide reacts with limewater.

[0018] 3. Verify that carbon dioxide reacts with water: Replace the limewater in beaker 6 with purple litmus solution. Turn on Kipp generator 4 and observe the phenomenon: after a while, the litmus solution turns red. Close Kipp generator 4 and the stopcock 8 and the stopcock 8 of the long glass tube 2. The phenomenon of litmus turning red indicates that carbon dioxide reacts with water to produce carbonic acid. At this time, the flask is still full of carbon dioxide.

[0019] 4. Exploring the Reaction of Carbon Dioxide with Sodium Hydroxide: Carbon dioxide gas reacts fully with sodium hydroxide solution, but no obvious phenomenon is observed. Proving the reaction between carbon dioxide and sodium hydroxide is a difficult point in junior high school chemistry teaching. This experiment can help overcome this difficulty. Experiment begins: First, use syringe 5 to take 20 mL of a certain concentration of sodium hydroxide solution, fill it, open the stopcock 8 on the infusion tubing, and slowly push it into the flask. Then close the stopcock 8 on the infusion tubing and remove syringe 5. After a short while, open the stopcock 8 on the glass tube 2 and observe the phenomenon: The reddened litmus solution in beaker 6 continuously flows into the flask along the glass tube 2, forming a beautiful fountain. Simultaneously, some litmus in the round-bottom flask 1 changes from red to blue. This fountain phenomenon proves that the full reaction of carbon dioxide and sodium hydroxide solution leads to the formation of negative pressure in the flask, turning a reaction that initially showed no phenomenon into one that does. At the same time, some litmus turns blue upon contact with the alkaline sodium carbonate solution. The multiple color changes throughout the process enhance the interest of this experiment.

[0020] 5. Carbonate Test: Replace the remaining litmus in beaker 6 with limewater. Use another syringe 5 to take about 20 ml of hydrochloric acid of a certain concentration. Attach syringe 5, open the infusion tubing stopcock 8, and slowly inject the hydrochloric acid solution into the flask. Close the infusion tubing stopcock 8, remove syringe 5, and observe the phenomenon: During the injection process, bubbles can be observed in the liquid in round-bottom flask 1, and the liquid eventually turns wine-red. (If no bubbles are initially produced, it is likely that the hydrochloric acid is consumed on excess sodium hydroxide without reacting with sodium carbonate. In this case, hydrochloric acid can be injected again. If the generated gas fails to make the limewater cloudy, air can be continuously injected to expel all the carbon dioxide from round-bottom flask 1, causing the limewater to become cloudy). The presence of carbonates in the flask liquid is proven by the bubbles generated when hydrochloric acid is injected into the solution, which turn the limewater cloudy. The fact that the entire liquid turns red indicates that an excess of hydrochloric acid was injected.

[0021] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A chemical experimental apparatus for testing the properties of carbon dioxide gas, characterized in that: It includes a round-bottom flask (1), a long glass tube (2), a short glass tube (3), a Kipp generator (4), a syringe (5), and a beaker (6); The round-bottom flask (1) is fixedly and inverted on an iron stand. The round-bottom flask (1) is connected to the beaker (6) through a long glass tube (2). The round-bottom flask (1) is connected to the Kipp generator (4) through a short glass tube (3). The syringe (5) is connected to the round-bottom flask (1) through an infusion tubing.

2. The chemical experimental apparatus for testing the properties of carbon dioxide gas according to claim 1, characterized in that: Both the long glass conduit (2) and the short glass conduit (3) are provided with a connecting hose (7) at one end. The connecting hose (7) is provided with a water-stop clamp (8), and the infusion hose is provided with a water-stop clamp (8).

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