CN203812478U

CN203812478U - Reaction of concentrated nitric acid and dilute nitric acid with copper demonstration device

Info

Publication number: CN203812478U
Application number: CN201420198243.6U
Authority: CN
Inventors: 吴方岩
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-04-23
Filing date: 2014-04-23
Publication date: 2014-09-03
Anticipated expiration: 2024-04-23

Abstract

The utility model discloses a reaction of concentrated nitric acid and dilute nitric acid with copper demonstration device which comprises a test tube with branch, a single hole rubber stopper, a syringe, a glass tube, a copper sheet, a iron wire, rubber tube, two rectangular ducts and an air collecting bottle. The glass tube probes into the test tube with branch through the single hole rubber stopper. The iron wire is inserted into the glass tube. One end of the iron wire is connected with the copper sheet which is arranged in the test tube with branch. The branch part of the test tube with branch is connected with one end of one rectangular duct through the rubber tube. The other end of the rectangular duct probes to the bottom of the air collecting bottle. The other rectangular duct is arranged at the mouth of the air collecting bottle. The demonstration device provides reactions in a closed experiment apparatus; the experiment phenomena are obvious and direct and achieve good contrast effects. The experiment process with the demonstration device is also easy to operate. At the same time, with the device, time for an experiment can be significantly reduced. Materials for reaction can be saved and since the reaction is done in a sealed manner, poisonous gases can be avoided so that they will not harm a teacher and students as well as the environment.

Description

The demonstration device that reacts of a kind of dense, rare nitric acid and copper

Technical field

The utility model relates to a kind of middle school chemistry experiment teaching field, the demonstration device that reacts of especially a kind of dense, rare nitric acid and copper.

Background technology

The reaction experiment of copper and red fuming nitric acid (RFNA), rare nitric acid is the important lecture experiment that Trait of Oxidative Nitric Acid embodies, and it is also a necessary student experimenting of grasping Trait of Oxidative Nitric Acid simultaneously.Experimental principle: different according to oxidisability dense, rare nitric acid, they react with copper sheet respectively, and reaction product is different, and relevant chemical equation is:

Cu+4HNO ₃(dense)=Cu (NO ₃) ₂+ 2NO ₂↑+2H ₂o

3Cu+8HNO ₃(rare)=3Cu (NO ₃) ₂+ 2NO ↑+4H ₂o

2NO+O ₂＝2NO ₂

3NO ₂+H ₂O＝4HNO ₃+NO↑

On teaching material, to this type of experiment, be simple carrying out in test tube, experimental drug consumption is uncontrollable, and the toxic gas NO, the NO that produce ₂spill in air, can cause certain harm to environment and teachers and students' health.

Summary of the invention

The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, and the react demonstration device of a kind of dense, rare nitric acid with copper is provided.

For achieving the above object, the utility model adopts following technical proposals:

A kind of dense, the demonstration device that reacts of rare nitric acid and copper, comprise that tool props up test tube, single hole rubber plug, syringe, glass tube, copper sheet, iron wire, rubber tube, right angle conduit and gas bottle, described glass tube is stretched described tool by described single hole rubber plug and is propped up in test tube, described iron wire is placed in described glass tube, one end of described iron wire be connected with one described in copper sheet, described copper sheet is placed in described tool and props up test tube, described tool props up test tube and props up mouth of pipe place and by described rubber tube, be connected with one end of described right angle conduit, the described right angle conduit other end stretches into described gas bottle bottom, described in another, right angle conduit is placed in described gas bottle bottle mouth position.

Described glass tube matches with described single hole rubber plug.

Described syringe, described tool prop up test tube and all seal.

The cotton that NaOH solution soaks is housed in described glass tube.

Described tool props up and in test tube, fills 3mL concentrated nitric acid solution.

In described syringe, fill 2mL distilled water.

In described gas bottle, fill appropriate NaOH solution

The beneficial effects of the utility model are,

1, in closed container, react, experimental phenomena is obviously directly perceived, and once experiment can be seen two experiment structures, and contrast effect is good;

2, combine dense, rare nitric acid respectively with the oxidation reaction of copper, verified that dense, rare nitric acid all has oxidisability, and different from the reacted product of copper, experiment safety is easy to operate;

3, experimental provision is novel in design, has greatly shortened experimental period, and drug dosage can control, and has avoided the harm of harmful gas to teachers and students and environment.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation.

Wherein 1, tool props up test tube, 2, iron wire, 3, glass tube, 4, copper sheet, 5, syringe, 6, single hole rubber plug, 7, rubber tube, 8, right angle conduit, 9, gas bottle.

Embodiment

Below in conjunction with drawings and Examples, the utility model is further illustrated.

A kind of dense, the demonstration device that reacts of rare nitric acid and copper, as shown in Figure 1, comprise that tool props up test tube 1, single hole rubber plug 6, syringe 5, glass tube 3, copper sheet 4, iron wire 2, rubber tube 7, right angle conduit 8 and gas bottle 9, glass tube 3 stretches into tool by single hole rubber plug 6 and props up in test tube 1, iron wire 2 is placed in glass tube 3, one end of iron wire 2 is connected with a copper sheet 4, copper sheet 4 is placed in tool and props up test tube 1, tool props up 1 mouth of pipe place of test tube and by rubber tube 7, is connected with one end of right angle conduit 8, conduit 8 other ends in right angle stretch into gas bottle 9 bottoms, another right angle conduit 8 is placed in gas bottle 9 bottle mouth positions.

Glass tube 3 matches with single hole rubber plug 6; Syringe 5, tool prop up test tube 1 and all seal; The cotton that NaOH solution soaks is housed in glass tube 3; Tool props up and in test tube 1, fills 3mL concentrated nitric acid solution; In syringe 5, fill 2mL distilled water; In gas bottle 9, fill appropriate NaOH solution.

Operating process is:

1, to tool, prop up in test tube 1 and add 3mL concentrated nitric acid solution, in gas bottle 9, add appropriate sodium hydroxide solution, in syringe 5, inject 2mL distilled water;

2, according to connecting as shown in the figure an instrument verifying attachment impermeability;

3, intercepting one end iron wire 2 is through glass tube 3, and the part of iron wire 2 in glass tube 3 is wound around the wet cotton that is soaked with sodium hydroxide solution, and iron wire 2 ends connect copper sheet 4 and stretch into tool and prop up in test tube 1, pull iron wire 2, and copper sheet 4 contacts and reacts with red fuming nitric acid (RFNA).Observe and find, tool props up reaction in test tube 1 acutely has rufous gas to generate, and liquid presents blue-green, and red fuming nitric acid (RFNA) and copper generation redox reaction are described, generates copper nitrate and nitrogen dioxide gas.

4, pushing syringe 5 pistons, inject tool by the distilled water in syringe 5 and prop up test tube 1, and red fuming nitric acid (RFNA) is made into rare nitric acid.Observe and find, in glass tube 3, be rufous, glass tube 3 is outer is colourless, and in a moment, glass tube 3 is outer also becomes rufous, illustrates that nitric oxide gas is water insoluble, runs into the nitrogen dioxide gas that airborne oxygen reaction generates rufous.

The utility model reacts in airtight experimental provision, and experimental phenomena is obviously directly perceived, and once experiment can be seen two experiment structures, and contrast effect is good; Combine dense rare nitric acid respectively with the oxidation reaction of copper, verified that dense, rare nitric acid all has oxidisability, and different from the reacted product of copper, experiment safety is easy to operate; Greatly shortened experimental period, and drug dosage can control, avoid the harm of harmful gas to teachers and students and environment.

Although above-mentioned, by reference to the accompanying drawings embodiment of the present utility model is described; but the not restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.

Claims

One kind dense, the demonstration device that reacts of rare nitric acid and copper, comprise that tool props up test tube, single hole rubber plug, syringe, glass tube, copper sheet, iron wire, rubber tube, right angle conduit and gas bottle, it is characterized in that, described glass tube stretches into described tool by described single hole rubber plug and props up in test tube, described iron wire is placed in described glass tube, one end of described iron wire be connected with one described in copper sheet, described copper sheet is placed in described tool and props up test tube, described tool props up test tube and props up mouth of pipe place and by described rubber tube, be connected with one end of described right angle conduit, the described right angle conduit other end stretches into described gas bottle bottom, described in another, right angle conduit is placed in described gas bottle bottle mouth position.
2. the demonstration device that reacts of a kind of dense, rare nitric acid as claimed in claim 1 and copper, is characterized in that, described glass tube matches with described single hole rubber plug.
3. the demonstration device that reacts of a kind of dense, rare nitric acid as claimed in claim 1 and copper, is characterized in that, described syringe, described tool prop up test tube and all seal.