Chlorine generation device and demonstration device for property verification experiment

Abstract

The utility model relates to the technical field of chemical experiments, and provides a chlorine generating device and a demonstration device for carrying out a property verification experiment, the chlorine generating device comprises a generating bag, a filter I, a filter II and a tail gas treatment bag, the generating bag is provided with a medicine adding port and a liquid adding port, a connecting pipe I is connected between an inlet of the filter I and the medicine adding port, and a connecting pipe II is connected between the filter II and the tail gas treatment bag. A second connecting pipe is connected between an inlet of the second filter and an outlet of the first filter, a third connecting pipe is connected to an outlet of the second filter, and an inlet of the tail gas treatment bag is connected with the third connecting pipe. According to the experimental device, gas preparation and property verification experiments are combined into a whole, the environment cannot be polluted, operation of a plurality of experiments can be carried out at a time, the experimental device is simple and convenient, the structure is simple, the design is reasonable, the experimental device is small in size and easy to manufacture, and experimental results are easy to observe.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical experiment technical field especially, it is a demonstration device of chlorine generation device and carries out property verification experiment. BACKGROUND

[0002] Chemistry is a subject based on experiment, and through experiment, knowledge can be vividly and directly imparted to students, teaching quality is improved and learning process is accelerated, and convenient, fast and environment-friendly chemical experiment device determines the success of experiment and teaching effect.

[0003] In the teaching of middle school chemistry, the chlorine production and property verification experiment device is composed of an iron stand, a round-bottom flask, a separating funnel, a rubber plug, a gas guide pipe, a gas collecting bottle, dry and wet cloth strips, etc. The shortcomings of the experiment device are: first, the experiment device is complex and the operation is tedious; second, chlorine gas is easy to leak in the experiment, which damages the health of teachers and students; third, in the experiment of verifying who has the bleaching property between dry chlorine and humid chlorine, multiple experiments need to be done, which causes secondary environmental pollution. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art and provides a demonstration device of chlorine generation device and bleaching experiment.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a demonstration device of chlorine generation device and property verification experiment, comprising a generation bag, a filter one, a filter two and a tail gas treatment bag, a dosing port and a liquid inlet are arranged on the generation bag, a connecting pipe one is connected between the inlet of the filter one and the dosing port, a three-way valve is arranged on the connecting pipe one, a connecting pipe two is connected between the inlet of the filter two and the outlet of the filter one, a connecting pipe three is connected to the outlet of the filter two, a three-way valve two, a three-way valve three, a three-way valve four, a three-way valve five and a three-way valve six are sequentially installed on the connecting pipe three, a syringe one is clamped to the other port of the three-way valve two, a syringe two is clamped to the other port of the three-way valve three, a syringe three is clamped to the other port of the three-way valve four, a syringe four is clamped to the other port of the three-way valve five, a syringe five is clamped to the other port of the three-way valve six, and the inlet of the tail gas treatment bag is connected with the connecting pipe three.

[0006] Further description of the above technical scheme:

[0007] Potassium permanganate solid and hydrochloric acid solution are added to the generating bag; saturated saline solution and anhydrous calcium chloride are added to the first filter; dry colored paper is added to the first syringe and moist colored paper is added to the second syringe; potassium iodide solution is added to the third syringe; a mixed solution of ferrous chloride and potassium thiocyanate is added to the fourth syringe; water and a magnesium strip are added to the fifth syringe; and sodium hydroxide solution is added to the exhaust gas treatment bag.

[0008] The generating bag and the exhaust gas treatment bag are medical infusion bags, and the first filter and the second filter are medical three-way bottles.

[0009] Both the unconnected port of filter one and the unconnected port of filter two are sealed with silicone screw caps.

[0010] A one-way valve is provided between the exhaust gas treatment bag and the syringe.

[0011] This utility model has the following beneficial effects:

[0012] This device integrates gas preparation and property verification experiments, which not only avoids environmental pollution but also allows for the simultaneous operation of multiple experiments, making it simple and convenient.

[0013] The experiment can be effectively controlled by setting multiple three-way valves. At the same time, a one-way valve is set between the exhaust gas treatment bag and syringe five to prevent backflow of gas, which would affect the experiment.

[0014] It has a simple structure, is easy to replace test reagents, has a reasonable design, a small experimental device size, is easy to manufacture, has low cost and low pollution, and is easy to observe experimental results. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the connection of a chlorine gas generating device and a demonstration device for property verification experiments.

[0016] Legend:

[0017] 1. Generating bag; 2. Filter 1; 3. Filter 2; 4. Exhaust gas treatment bag; 5. Connecting pipe 1; 6. Three-way valve 1; 7. Connecting pipe 2; 8. Connecting pipe 3; 9. Three-way valve 2; 10. Three-way valve 3; 11. Three-way valve 4; 12. Three-way valve 5; 13. Three-way valve 6; 14. Injector 1; 15. Injector 2; 16. Injector 3; 17. Injector 4; 18. Injector 5; 19. Check valve. Detailed Implementation

[0018] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Figure 1 As shown in the utility model discloses a chlorine generating device and carries out the demonstration device of nature verification experiment, including generating bag 1, filter one 2, filter two 3 and tail gas treatment bag 4, be equipped with dosing port and liquid inlet on generating bag 1, the import of filter one 2 is connected with dosing port between connecting pipe one 5, be equipped with three -way valve one 6 on connecting pipe one 5, the import of filter two 3 is connected with the export of filter one 2 between connecting pipe two 7, the export of filter two 3 is connected with connecting pipe three 8, connecting pipe three 8 is installed with three -way valve two 9, three -way valve three 10, three -way valve four 11, three -way valve five 12 and three -way valve six 13 in proper order, another port of three -way valve two 9 is clamped syringe one 14, another port of three -way valve three 10 is clamped syringe two 15, another port of three -way valve four 11 is clamped syringe three 16, another port of three -way valve five 12 is clamped syringe four 17, another port of three -way valve six 13 is clamped syringe five 18, the import of tail gas treatment bag 4 is connected with connecting pipe three 8.

[0020] Potassium permanganate solid and 2mol / L hydrochloric acid solution are added in generating bag 1, saturated brine is added in filter one 2, anhydrous calcium chloride is added in filter one 2, dry color paper is added in syringe one 14, wet color paper is added in syringe two 15, potassium iodide solution is added in syringe three 16, mixed solution of ferrous chloride and potassium thiocyanate is added in syringe four 17, water is added in syringe five 18 and magnesium strip is put in, sodium hydroxide solution is added in tail gas treatment bag 4.

[0021] Medical infusion bag is used in generating bag 1 and tail gas treatment bag 4, medical three -way bottle is used in filter one 2 and filter two 3.

[0022] Silica gel screw cap is used for sealing in the port without connection of filter one 2 and the port without connection of filter two 3.

[0023] One-way valve 19 is arranged between tail gas treatment bag 4 and syringe five 18.

[0024] 15ML 2mol / L hydrochloric acid solution is added in generating bag 1, and the expansion of generating bag 1 at this time indicates that gas is generated (the path of three -way valve one to filter one is in closed state);

[0025] 2KMn04+ 16HCl = 2KCl + 2MnCl2+ 5Cl2↑+ 5H20

[0026] The production of chlorine gas makes the bag 1 to expand.

[0027] Then open the three-way valve one 6, the gas passes through the filter one 2 and the filter two 3 to remove impurities (the filter one 2 removes hydrogen chloride in the chlorine gas, and the filter two 3 absorbs water vapor in the chlorine gas), and then open the three-way valve two 9 and the three-way valve three 10, the gas flows into the syringe one 14 and the syringe two 15, at this time the dry color paper in the syringe one 14 has no change, and the wet color paper in the syringe two 15 fades, which shows that the dry chlorine gas has no bleaching property, and the wet chlorine gas has bleaching property, and the principle is that chlorine gas reacts with water to produce hypochlorous acid with bleaching property:

[0028]

[0029] Open the three-way valve four 11, and make the gas flow into the syringe three 16, at this time the potassium iodide solution in the syringe three 16 becomes brown, which shows that the chlorine gas has oxidizing property, and the principle is that when the chlorine gas is introduced, the chlorine gas oxidizes the iodine ion into iodine element, which presents yellow in water, and with the increase of the iodine element, the solubility of iodine in water is small, and solid iodine is precipitated, forming brownish red precipitate;

[0030] Cl2+ 2KI = 2KCl + I2

[0031] Open the three-way valve five 12, and make the gas flow into the syringe four 17, at this time the ferrous chloride and potassium thiocyanate mixed solution in the syringe four 17 becomes red, which shows that the chlorine gas has oxidizing property, and the reason is that the chlorine gas reacts with ferrous chloride to generate trivalent iron ion, and the trivalent iron ion reacts with potassium thiocyanate to generate red complex;

[0032] Cl2+ 2FeCl2= 2FeCl3

[0033] FeCl3+ 3KSCN = Fe (SCN) 3 (complex) + 3KCl (complex reaction)

[0034] Open the three-way valve six 13, and make the gas flow into the syringe five 18, at this time the surface of the magnesium strip in the syringe five 18 has bubbles, which shows that the chlorine gas reacts with water, and the reason is that the chlorine gas reacts with water to generate hydrochloric acid, and the hydrochloric acid reacts with the magnesium strip to generate hydrogen gas;

[0035]

[0036] Mg + HCl = MgCl2+ H2↑

[0037] Close the three-way valve two 9, the three-way valve three 10, the three-way valve four 11, the three-way valve five 12 and the three-way valve six 13, make the gas in the bag 1 directly react with the sodium hydroxide solution added in the tail gas treatment bag 4, at this time, the crystal is precipitated in the tail gas treatment bag 4 and the tail gas treatment bag 4 has light yellow color.

[0038] In Cl2+2NaOH=NaCl+NaClO+H2O, the valence of chlorine element is increased from 0 to +1 (in NaClO), loses electrons and is oxidized, so chlorine is a reducing agent;

[0039] The valence of chlorine element is reduced from 0 to -1 (in NaCl), gains electrons and is reduced, so chlorine is also an oxidizing agent, and the generated NaCl is a reduction product

[0040] It is shown that chlorine (Cl2) is both an oxidizing agent and a reducing agent.

[0041] Among them, the three-way valve two 9, the three-way valve three 10, the three-way valve four 11, the three-way valve five 12 and the three-way valve six 13 can be opened according to the use demand, and can not be operated in order.

[0042] The syringes one 14 to the syringes five 18 can also be replaced with other test reagents.

[0043] The device can be fixed on a display board by a fixing member, so as to facilitate observation of students.

[0044] The above describes the present application and its embodiments, which are not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired, without departing from the creative purpose of the present application, without creative design, similar structure and embodiments of the technical scheme, which should belong to the protection scope of the present application.

Claims

1. A demonstration device for chlorine generation and performing a property verification experiment, comprising a generation bag (1), a filter I (2), a filter II (3) and a tail gas treatment bag (4), characterized in that, The generating bag (1) is provided with a dosing port and a liquid adding port, a connecting pipe (5) is connected between the dosing port and the inlet of the filter (2), a three-way valve (6) is arranged on the connecting pipe (5), a connecting pipe (7) is connected between the inlet of the filter (2) and the outlet of the filter (2), a connecting pipe (8) is connected to the outlet of the filter (2), a three-way valve (9), a three-way valve (10), a three-way valve (11), a three-way valve (12) and a three-way valve (13) are sequentially arranged on the connecting pipe (8), the other port of the three-way valve (9) is clamped with a syringe (14), the other port of the three-way valve (10) is clamped with a syringe (15), the other port of the three-way valve (11) is clamped with a syringe (16), the other port of the three-way valve (12) is clamped with a syringe (17), the other port of the three-way valve (13) is clamped with a syringe (18), and the inlet of the tail gas treatment bag (4) is connected with the connecting pipe (8).

2. The chlorine generation device and demonstration device for performing a property verification experiment of claim 1, wherein: The generating bag (1) is provided with a dosing port and a liquid adding port, a connecting pipe (5) is connected between the dosing port and the inlet of the filter (2), a three-way valve (6) is arranged on the connecting pipe (5), a connecting pipe (7) is connected between the inlet of the filter (2) and the outlet of the filter (2), a connecting pipe (8) is connected to the outlet of the filter (2), a three-way valve (9), a three-way valve (10), a three-way valve (11), a three-way valve (12) and a three-way valve (13) are sequentially arranged on the connecting pipe (8), the other port of the three-way valve (9) is clamped with a syringe (14), the other port of the three-way valve (10) is clamped with a syringe (15), the other port of the three-way valve (11) is clamped with a syringe (16), the other port of the three-way valve (12) is clamped with a syringe (17), the other port of the three-way valve (13) is clamped with a syringe (18), and the inlet of the tail gas treatment bag (4) is connected with the connecting pipe (8).

3. The chlorine generation device and demonstration device for performing a property verification experiment of claim 1, wherein: The generating bag (1) and the tail gas treatment bag (4) are medical infusion bags, and the filter (2) and the filter (3) are medical three-way bottles.

4. The chlorine generation device and demonstration device for performing a property verification experiment of claim 1, wherein: The unconnected port of the filter (2) and the unconnected port of the filter (3) are sealed by silica gel screw caps.

5. The chlorine generation device and demonstration device for performing a property verification experiment of claim 1, wherein: The tail gas treatment bag (4) and the syringe (18) are provided with a one-way valve (19).

6. The chlorine generation device and demonstration device for performing a property verification experiment of claim 1, wherein: The three-way valves (9) to (13) can be opened according to the use requirements, and can be operated without following the sequence.

7. The chlorine generation device and demonstration device for performing a property verification experiment of claim 1, wherein: The syringes (14) to (18) can be replaced with other test reagents.

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