CN206040039U - Hydrogen peroxide decomposition percentage test teaching lecture experiment device under light conditions - Google Patents

Abstract

Hydrogen peroxide decomposition percentage test teaching lecture experiment device under light conditions includes a metal section of thick bamboo, establishes the illuminator of the electrified source line of bottom in a metal section of thick bamboo, puts the tripod of bottom in a metal section of thick bamboo, places the erlenmeyer flask on the tripod, establishes at the glass delivery tube who lies in the erlenmeyer flask top, and this glass delivery tube is connected with spherical drying tube, and spherical drying tube is connected with the syringe again, and the syringe adopts the support of iron stand platform. The beneficial effects of the utility model are that: testing device structure is simple, operation process is clear convenient, and the experiment success rate is high, test interestingly, has the advantage that the teaching is lively, the perceptual knowledge is strong, easily the student grasps the knowledge of imparting knowledge to students as early as possible. The utility model discloses hydrogen peroxide's decomposition and geochemical gas survey device is as an organic whole under the light harvesting condition of shining, has set up the interference that other light had been avoided to the light -resistant device, has increased the measuring error that drying device had avoided vapor to arouse, has ensured the accurate relatively of experimental data.

Description

Under illumination condition, hydrogen peroxide decomposes percentage test teaching demonstration experimental provision

Technical field

The utility model belongs to chemistry teaching apparatus for demonstrating, especially hydrogen peroxide resolution measurement teaching demonstration under illumination condition Experimental provision structure technology.

Background technology

Hydrogen peroxide, is commonly called as hydrogen peroxide.Industrially, commonly use and do oxidant, bleaching agent etc., of many uses, some are hazardous Product warehouse, chemical enterprise storage and usage amount are all than larger.Hydrogen peroxide itself can not burn, and in general, decompose Water and oxygen is generated, decomposition rate is slow.But alkaline solution, be heated, illumination or metal ion exist under conditions of decompose plus Play, container pressure increase severely, dangerous to increase, and during causing the production, use that hydrogen peroxide participates in, Jing often occurs the peace such as blast Full accident, causes very serious life and property loss and social influence.So, fully realize the decomposition explosion danger of hydrogen peroxide Dangerous characteristic, is of great significance to strengthening its safety management and keeping the safety in production all to have.

At present, the research of the experimental provision of hydrogen peroxide decomposition of dangerous influential factors is concentrated mainly on using metal from Son, enzyme are done on catalyst or direct-fired experimental provision, and accelerate which to being irradiated by the light of various different wave lengths The teaching demonstration experimental provision research of decomposition rate is upper or blank.

The content of the invention

The purpose of this utility model is precisely in order to overcoming the defect of above-mentioned prior art presence and providing a kind of with teaching Vividly, perceptual knowledge is strong, be easy to student grasps hydrogen peroxide under the illumination condition of teaching knowledge as early as possible and decomposes percentage test religion Learn demonstrating experiment device.

The purpose of this utility model is achieved by the following technical solution.

Under illumination condition, hydrogen peroxide decomposes percentage test teaching demonstration experimental provision, and the utility model is characterised by, Including：One metal cylinder, is located at the illuminator of the charged line of metal cylinder inner bottom part, is placed on the tripod of metal cylinder inner bottom part, The conical flask being placed on tripod, the grass tube being provided above conical flask, the grass tube are connected with spherical drying tube Connect, spherical drying tube is connected with syringe again, syringe is supported using iron stand.

On industrial application, hydrogenperoxide steam generator concentration has 27.5%, 30%, 35%, 50%, 70% etc..This teaching is drilled Show experimental provision with 35% the more commonly used hydrogenperoxide steam generator as experimental subjects.Experimental implementation person connects illuminator, persistently right Quantitative hydrogenperoxide steam generator is irradiated certain hour, and the hydrogenperoxide steam generator in conical flask is decomposed, and generates water and oxygen Gas, causes pressure in conical flask to increase, and after anhydrous calcium chloride drying, pushing syringe piston is past to move to right the oxygen of generation It is dynamic, it is finally reached pressure in bottle equal with environmental stress and stop moving.The corresponding scale in syringe piston position is Hydrogen peroxide decomposes the oxygen volume for generating, volume, density and environment temperature, pressure further according to the taken hydrogen peroxide of experiment etc. Data, calculate the amount of the material that hydrogen peroxide decomposes by The Ideal-Gas Equation and chemical equation, final to calculate Go out hydrogen peroxide and decompose percentage after the light irradiation certain hour of the wavelength.

The chemical equation being related to is：

Hydrogen peroxide decomposes percentage (mol/mol)：

(wherein：P is environmental stress, and unit is Pa；V_GasFor the oxygen volume for measuring, unit is m³；R is constant 8.314；T For environment kelvin degree, unit is K；ρ is 35% hydrogenperoxide steam generator density, and unit is g/cm³；V_LiquidPeroxide is taken by experiment Change hydrogen solution volume, unit is ml.)

Experimental article used is：

1. experimental drug：35% hydrogenperoxide steam generator, anhydrous CaCl₂

2. laboratory apparatus：Metal cylinder, illuminator (containing power line), conical flask, grass tube, spherical drying tube, syringe, Iron stand

The utility model makes hydrogen peroxide decompose by the light irradiation of different wave length, and the water of generation is by anhydrous calcium chloride Absorb, the oxygen of generation makes pressure increase pushing syringe piston in conical flask move right, until the equal stopping of inside and outside pressure It is mobile.Experimental provision assembling is easy, and experimentation is simple to operate, and the volume for generating oxygen easily reads.

Operating procedure：

1. pertinent instruments are assembled, and experimental implementation person takes 35% hydrogenperoxide steam generator of certain volume and is put in conical flask, Rubber stopper is stoppered, cover is covered.

2. experimental implementation person switches on power, and illuminator direct irradiation is being held on the conical flask of hydrogenperoxide steam generator.Open Beginning timing, after certain hour (such as one hour), closes power supply, writes down the scale reading of the final stop place of syringe piston.

3. according to scale reading in conjunction with testing the data such as volume, density and environment temperature, the pressure of taken hydrogen peroxide, Hydrogen peroxide is calculated using The Ideal-Gas Equation and chemical equation to divide under the light irradiation of the time period wavelength Solution percentage.

4. the illuminator for changing different wave length (such as 254nm uviol lamps, 365nm uviol lamps) repeats this experiment, and carries out Relatively.

The beneficial effects of the utility model are：Experimental provision simple structure, operating process clearly facilitate, experiment success rate Height, experiment are interesting, have the advantages that teaching is lively, perceptual knowledge is strong, be easy to student and grasp teaching knowledge as early as possible.This practicality is new Type integrates the decomposition of hydrogen peroxide and gas measurement device under the conditions of light irradiation, is provided with light-shading apparatus and avoids other light The interference of line, increased drying device and avoids the measure error that vapor causes, it is ensured that experimental data it is relatively accurate.

Description of the drawings

Fig. 1 is the utility model structural representation；

1- metal cylinders in figure, the illuminator of 2- charged lines, 3- tripods, 4- conical flasks, 5- grass tubes, 6- are spherical dry Dry pipe, 7- syringes, 8- iron stands.

Specific embodiment

See Fig. 1, hydrogen peroxide decomposes percentage test teaching demonstration experimental provision, the utility model feature under illumination condition It is, including：One metal cylinder 1, is located at the illuminator 2 of the charged line of 1 inner bottom part of metal cylinder, is placed on 1 inner bottom part of metal cylinder Tripod 3, the conical flask 4 being placed on tripod 3, the grass tube 5 being provided above conical flask 4, the grass tube 5 It is connected with spherical drying tube 6, spherical drying tube 6 is connected with syringe 7 again, and syringe 7 is supported using iron stand 8.

The several items that should be noted in experimentation：

1. the amount of hydrogenperoxide steam generator is unsuitable excessive, in case the oxygen volume for generating causes measurement not more than syringe volume It is accurate.

2. in guaranteeing experimental provision, decompose, be dried and measure the air-tightness of this partial devices of gas, in case gas leakage causes measurement to miss Difference.

3. syringe piston part mobility is guaranteed preferably, so that inside and outside device, pressure is finally equal, it is ensured that the standard of measurement Really.

4. syringe graduation reading should be corresponding numerical value when piston is no longer moved, it is ensured that measurement it is accurate.

Claims (1)

1. under illumination condition, hydrogen peroxide decomposes percentage test teaching demonstration experimental provision, it is characterised in that include：One golden Category cylinder (1), is located at the illuminator (2) of the charged line of metal cylinder (1) inner bottom part, is placed on the tripod of metal cylinder (1) inner bottom part (3) conical flask (4), being placed on tripod (3), the grass tube (5) being provided above conical flask (4), the glass are led Pipe (5) is connected with spherical drying tube (6), spherical drying tube (6) and is connected with syringe (7), and syringe (7) adopts iron stand (8) support.