CN208922597U

CN208922597U - A kind of chemistry teaching demonstrator

Info

Publication number: CN208922597U
Application number: CN201820175548.3U
Authority: CN
Inventors: 苗红菊; 伍秀兰; 程钰
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-01-31
Filing date: 2018-01-31
Publication date: 2019-05-31
Anticipated expiration: 2028-01-31

Abstract

The utility model discloses a kind of chemistry teaching demonstrators, including carbon dioxide preparation tank, demonstration tank, conduit, high-order candle and low level candle；The conduit is connected to preparation tank and demonstration tank is used to introduce carbon dioxide in the middle part of demonstration tank；The demonstration tank is equipped with elevated outlet corresponding with the flame of high-order candle and low level candle respectively and low level outlet, and elevated outlet is higher than the exhaust outlet of the conduit, and low level outlet is lower than the exhaust outlet of the conduit；This demonstrator meets the cognitive law of student, can more complete the teaching that people teaches version properties of carbon dioxide progressively.

Description

A kind of chemistry teaching demonstrator

Technical field

The utility model relates to a kind of chemistry experiment instrument, in particular to a kind of chemistry teaching demonstrator.

Background technique

Compulsory education textbook people teaches chemical 6th unit project three " the carbon dioxide and carbon monoxide " teaching of version ninth grade In, teaching material design Experimental Research completes property with three small experiment and probes into, and experimentation is more complicated, expends a large amount of Instructional blocks of time, while a large amount of experimental drug is also wasted, it need to improve.

Therefore, in order to solve the above problem, a kind of cognitive law for meeting student is needed, can more complete people's religion progressively The chemistry teaching demonstrator of the teaching of version properties of carbon dioxide.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of cognitive law for meeting student, it more can be progressive Complete the chemistry teaching demonstrator that people teaches the teaching of version properties of carbon dioxide in ground.

The chemistry teaching demonstrator of the utility model, including carbon dioxide preparation tank, demonstration tank, conduit, high-order candle and Low level candle；The conduit is connected to preparation tank and demonstration tank is used to introduce carbon dioxide in the middle part of demonstration tank；The demonstration tank It is exported equipped with elevated outlet corresponding with the flame of high-order candle and low level candle respectively and low level, and elevated outlet is higher than described The exhaust outlet of conduit, low level outlet are lower than the exhaust outlet of the conduit；

Further, suspention has high-order litmus paper and low level litmus paper in the demonstration tank；The high position litmus paper Higher than the exhaust outlet of conduit, the low level litmus paper is lower than the exhaust outlet of conduit；

Further, the high-order litmus paper and low level litmus paper are suspended on the bottle stopper of demonstration tank by peg wood；

Further, the bottle stopper of the preparation tank is equipped with the hook that can slide up and down；There is for holding suspention on the hook Receive the reaction bag of lime stone；Through-hole is distributed on the reaction bag.

The utility model has the beneficial effects that the chemistry teaching demonstrator using the utility model carries out teaching demonstration, teaching Middle school student are learned to be easy to obtain the property of " carbon dioxide does not burn, the density of burning and carbon dioxide is not supported to be greater than air " Matter；This demonstrator can Reusability, save experiment consumptive material；Comparison can be realized in same container, contrast phenomenon is more intuitive, bright Aobvious, effect is more preferable；This device can more meet the cognitive law of student, can more complete people progressively and teach version properties of carbon dioxide Teaching.

Detailed description of the invention

The utility model is further described with reference to the accompanying drawings and examples:

Fig. 1 is the structural schematic diagram of the utility model.

Specific embodiment

Fig. 1 is the structural schematic diagram of the utility model, as shown in the figure: the chemistry teaching demonstrator of the present embodiment, including two Carbonoxide preparation tank 9, demonstration tank 3, conduit 7, high-order candle 1 and low level candle 6；The conduit 7 is connected to preparation tank 9 and demonstration Tank 3 is used to introducing carbon dioxide into 3 middle part of demonstration tank, and wherein the air inlet of conduit 7 is inserted into preparation tank from the bottle stopper of preparation tank 9 In 9；The demonstration tank 3 is equipped with elevated outlet 2 corresponding with the flame of high-order candle 1 and low level candle 6 respectively and low level outlet 5, elevated outlet 2 and low level outlet 5 are set up separately in the two sides of demonstration tank 3, and are separately connected a fairlead for that will demonstrate in tank 3 Gas is guided to the flame location of candle, and elevated outlet 2 is higher than the exhaust outlet of the conduit 7, and low level outlet 5 is led lower than described The exhaust outlet of pipe 7；Suspention has high-order litmus paper 4 and low level litmus paper 11 in the demonstration tank 3；The high position litmus paper 4 are higher than the exhaust outlet of conduit 7, and the low level litmus paper 11 is lower than the exhaust outlet of conduit 7；The high position litmus paper 4 and low Position litmus paper 11 is suspended on the bottle stopper of demonstration tank 3 by peg wood；The bottle stopper of the preparation tank 9 is equipped with and can slide up and down Hook 8；Suspention has the reaction bag 10 for accommodating lime stone on the hook 8；Through-hole is distributed on the reaction bag 10；Preparation Tank 9 is provided with dilute hydrochloric acid, by slide downward hook 8, is immersed in the lime stone in reaction bag 10 in dilute hydrochloric acid, reaction generates Carbon dioxide by conduit 7 be transported to demonstration tank 3 middle part.

When demonstration, high-order candle 1 and low level candle 6 are lighted, and sprays water on litmus paper, student will be observed that " low Candle extinguishes " and low level litmus paper 11 change colour, therefore, student be easy to obtain " carbon dioxide does not burn, does not support to burn, Density is greater than air " and " product that carbon dioxide is reacted with water makes reindeer moss change colour " property, and " high candle does not extinguish " And the desire for knowledge of the experimental phenomena meeting strong impulse student of " high-order litmus paper 4 does not change colour ", excite their spy Study carefully interest, stimulate they continue probe into, and low level outlet 5 is closed at this time, can observe that " high candle also extinguishes " is same immediately When " high-order litmus paper 4 also changes colour " the phenomenon that, and then can guide student thinking why, to further verify titanium dioxide The density of carbon is greater than air.

Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng The utility model is described in detail according to preferred embodiment, those skilled in the art should understand that, it can be to this The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model It encloses, should all cover in the scope of the claims of the utility model.

Claims

1. a kind of chemistry teaching demonstrator, it is characterised in that: including carbon dioxide preparation tank, demonstration tank, conduit, be located at demonstration tank Outer high-order candle and low level candle；The conduit is connected to preparation tank and demonstration tank is used to be introduced into carbon dioxide in demonstration tank Portion；The demonstration tank is equipped with elevated outlet corresponding with the flame of high-order candle and low level candle respectively and low level outlet, and high Position outlet is higher than the exhaust outlet of the conduit, and low level outlet is lower than the exhaust outlet of the conduit；Suspention has height in the demonstration tank Position litmus paper and low level litmus paper；The high position litmus paper is higher than the exhaust outlet of conduit, and the low level litmus paper is low In the exhaust outlet of conduit；The high position litmus paper and low level litmus paper are suspended on the bottle stopper of demonstration tank by peg wood.

2. chemistry teaching demonstrator according to claim 1, it is characterised in that: the bottle stopper of the preparation tank be equipped with can on The hook of lower slider；Suspention has the reaction bag for accommodating lime stone on the hook；Through-hole is distributed on the reaction bag.