CN209297593U - " black bread " fiber communication experiment demonstration instrument - Google Patents

Abstract

The utility model relates to a kind of " black bread " fiber communication experiment demonstration instruments.Vertical columns on pedestal fix test tube, syringe and flask on column, and test tube, which is communicated by threeway with sealed bottom in syringe and flask, gas vent at the top of beaker, fuchsin solution i.e. pararosaniline hydrochloridc is filled in the flask.Its structure is simple, easy to operate, and effect is obvious, discharges without penetrating odor sulfur dioxide gas, is convenient for class demonstration.

Description

" black bread " fiber communication experiment demonstration instrument

Technical field

The utility model belongs to senior chemistry class chemical experiment teaching aid, especially a kind of " black bread " demonstrating experiment device.

Background technique

" black bread " lecture experiment is the chemical experiment of senior chemistry, in this test, has a large amount of sulfur dioxide Discharge, is pungent unpleasant.This experiment directly empties at present, handles without special equipment sulfur dioxide, in this way in class Hall demonstration, students' union smells pungent taste, does not meet environmental requirement.

Summary of the invention

The shortcomings that in order to overcome the prior art, the utility model provide a kind of " black bread " fiber communication experiment demonstration instrument, the letter of its structure Single, easy to operate, effect is obvious, discharges without penetrating odor sulfur dioxide gas, is convenient for class demonstration.

The technical solution adopted by the utility model to solve its technical problems is that: vertical columns on pedestal, it is fixed on column Test tube, syringe and flask, test tube, which is communicated by threeway with sealed bottom in syringe and flask, gas vent at the top of beaker, Fuchsin solution i.e. pararosaniline hydrochloridc is filled in the flask.

The utility model have the advantage that 1), structure it is simple, it is easy to use；2), effect is obvious, does not have irritation gas The discharge of taste sulfur dioxide gas；3), globality is strong, easy to operate；4), not only experimental phenomena is obviously changed, digitization, will also Irritative gas in traditional " black bread " experiment is handled；5), class demonstration effect is very good, can not only cause student The interest of study, moreover it is possible to excite the thinking of student；6), safe and reliable, environment-friendly tasteless；7) efficiency of giving lessons for, improving teacher, changes It has been apt to the environment of giving lessons of teacher, has achieved good effect.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is the utility model section view.

Specific embodiment

As shown in Figure 1, vertical columns 7 on pedestal 1, test tube 4, syringe 6 and flask 11 are fixed on column 7, test tube 4 passes through Threeway 5 has gas vent 8 with the top that sealed bottom in syringe 6 and flask 11 communicates beaker 9, fills product in the flask 11 Red solution, that is, pararosaniline hydrochloridc.

The internal upper part of the flask 11 is communicated by communicating pipe 10 with the interior sealed bottom of beaker 9, fills magenta in beaker 9 Solution.

The test tube 4, syringe 6, flask 11 and beaker 9 are transparent, convenient for observation.

Temperature indicating paster 3 is posted on the outer wall of the test tube 4, the heat generated convenient for observing response.

" black bread " experimentation:

20mL cane sugar powder is poured into test tube 4 first, a dropper distilled water is instilled and moistens sucrose powder, the 10mL concentrated sulfuric acid is taken to fall Enter in test tube 4, covers rubber stopper rapidly and shake up and be fixed on column 7.Threeway 5 is rotated, communicates test tube 4 with flask 11, gas Body enters fuchsin solution, it can be seen that fuchsin solution gradually fades.In the process, it can be appreciated that the bubble for having black in test tube 4 Group generates, and exactly likes " black bread ".

Fuchsin solution in beaker 9 can be further processed the sulfur dioxide gas not handled by flask 11.

Threeway is adjusted, communicates test tube 4 with syringe 6, the gas that experiment generates can be collected, so that other experiments make With.

After generating there is no bubble and test tube 4 is cooling, using syringe, the NaOH solution for being used in vent gas treatment is fallen It is drawn to test tube 4, handles residual gas in test tube.

Claims (4)

1. a kind of " black bread " fiber communication experiment demonstration instrument, it is characterised in that: vertical columns (7) on pedestal (1), fixed examination on column (7) (4), syringe (6) and flask (11) are managed, test tube (4) passes through threeway (5) and syringe (6) and the interior sealed bottom phase of flask (11) Have gas vent (8) at the top of logical beaker (9), fills fuchsin solution i.e. pararosaniline hydrochloridc in the flask (11).

2. " black bread " fiber communication experiment demonstration instrument according to claim 1, it is characterised in that: the internal upper part of the flask (11) is logical It crosses and is communicated with the interior sealed bottom of beaker (9) communicating pipe (10), fill fuchsin solution in beaker (9).

3. " black bread " fiber communication experiment demonstration instrument according to claim 2, it is characterised in that: the test tube (4), syringe (6), flask (11) and beaker (9) are transparent.

4. " black bread " fiber communication experiment demonstration instrument according to claim 1, it is characterised in that: pasted on the outer wall of the test tube (4) There are temperature indicating paster (3).