CN203812472U

CN203812472U - Experimental apparatus for preparing ferrous hydroxide

Info

Publication number: CN203812472U
Application number: CN201420155357.2U
Authority: CN
Inventors: 罗天舒
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-04-02
Filing date: 2014-04-02
Publication date: 2014-09-03
Anticipated expiration: 2024-04-02

Abstract

The utility model discloses an experimental apparatus for preparing ferrous hydroxide. The experimental apparatus comprises an ammonia gas preparation device and a ferrous hydroxide preparation device. The ammonia gas preparation device comprises a test tube having a branch tube, a separating funnel, a rubber stopper, an airway tube and a test tube. The separating funnel is installed at the mouth of the test tube having the branch tube via the rubber stopper. One end of the airway tube is connected to the branch tube of the test tube having the branch tube, and the other end is disposed in the mouth of the inverted test tube. The ferrous hydroxide preparation experimental device includes a ruler, a test tube, a rubber stopper and an injection syringe, and the needle of the injection syringe is fixed onto the rubber stopper. According to the utility model, the experimental apparatus for preparing ferrous hydroxide has the characteristics of simple experimental apparatus, easy experimental operation, rigorous experimental design and obvious experimental phenomenon, and is a practical laboratory experimental apparatus for preparing ferrous hydroxide.

Description

A kind of experimental provision of preparing hydrogen iron protoxide

Technical field

The utility model relates to a kind of middle school chemistry experiment teaching field, especially a kind of experimental provision of preparing hydrogen iron protoxide.

background technology

In senior chemistry textbook, under normal temperature and pressure, ferrous hydroxide is white precipitate, in air, can become rapidly celadon, finally becomes rufous ferric hydroxide precipitate.Principle is:

Fe ²⁺+ OH ^-→ Fe (OH) ₂(white flocculent deposit)

4Fe (OH) ₂+ H ₂o+O ₂→ 4Fe (OH) ₃(red-brown precipitation)

In actual mechanical process, under the condition due to the very difficult isolated air of experimentation, carry out, the ferrous hydroxide of production is combined with airborne oxygen G&W rapidly, cannot observe the color of ferrous hydroxide precipitation.Therefore, in most of high school chemistry teaching experiments, cannot clearly observe the white precipitate of ferrous hydroxide, can only require student to memorize mechanically this knowledge point, this makes student more suspect the color of ferrous hydroxide, be unfavorable for that student, to this mastery of knowledge and study, also greatly reduces student's learning interest.

Summary of the invention

The features such as the purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, and a kind of device of product in laboratory ferrous hydroxide is provided, and it has, and experimental provision is simple, convenient experimental operation, experimental phenomena are obvious.

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

A kind of experimental provision of preparing hydrogen iron protoxide, comprise ammonia device for making and ferrous hydroxide device for making, described ammonia device for making comprises that tool props up test tube, separating funnel, plug, wireway and test tube, described separating funnel is installed on described tool by plug and props up test tube mouth of pipe place, one end of described wireway is connected with the arm that described tool props up test tube, and the other end is placed in inverted described test tube mouth; Described ferrous hydroxide is produced experimental provision and is comprised ruler, test tube, plug and syringe, and the syringe needle of described syringe is fixed on described plug.

Described test tube and described syringe are two, and described plug is three.

Described plug and described tool prop up the test tube mouth of pipe and the described test tube mouth of pipe all matches.

The beneficial effects of the utility model are,

(1) experimental provision is simple, and ferrous hydroxide is produced process does not have complicated air-discharging device, gathers materials on the spot with reactant ammonia deaeration;

(2) experimental design is rigorous, collects excess of ammonia gas and guarantees noresidue air in test tube, and the use of syringe, has guaranteed in course of reaction, without Air infitration, to guarantee experiment success rate;

(3) convenient experimental operation, has collected after ammonia, only needs operating syringe to get final product observation experiment phenomenon;

(4) experimental phenomena is obvious, adds one group of contrast experiment, operates simultaneously, and strong explanation is in the experimental result having in airfree situation.

Accompanying drawing explanation

Fig. 1 is ammonia device for making structural representation in the utility model;

Fig. 2 is ferrous hydroxide device for making structural representation in the utility model.

Wherein 1. tools prop up test tube, 2. separating funnel, 3. wireway, 4. test tube, 5. plug, 6. ruler, 7. syringe.

Embodiment

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

A kind of experimental provision of preparing hydrogen iron protoxide, as depicted in figs. 1 and 2, comprise ammonia device for making and ferrous hydroxide device for making, ammonia device for making comprises that tool props up test tube 1, separating funnel 2, plug 5, wireway 3 and test tube 4, separating funnel 2 is installed on tool by plug 5 and props up test tube 1 mouth of pipe place, one end of wireway 3 is connected with the arm that tool props up test tube 1, and the other end is placed in 4 mouthfuls, inverted test tube; Ferrous hydroxide is produced experimental provision and is comprised ruler 6, test tube 4, plug 5 and syringe 7, and the syringe needle of syringe 7 is fixed on plug 5.

Test tube 4 and syringe 7 are two; Plug 5 props up test tube 1 mouth of pipe with tool and test tube 4 mouths of pipe all match.

Specific experiment operating process is as follows:

1, NH ₃the process of producing

(1) first to a clean tool, prop up in test tube 1 and add appropriate NaOH solid, then to the appropriate dense NH of the interior injection of separating funnel 2 ₃h ₂o, and with plug 5, be fixed on tool and prop up on test tube 1, guarantee that the impermeability of ammonia device for making is good.

(2) piston on rotation separating funnel 2, now dense NH ₃h ₂o inflow tool props up in test tube 1 and reacts with solid NaOH, gets the downward air-discharging method of A test tube 4 use of dried and clean and collects the ammonia generating.

2, ferrous hydroxide is produced process

(1) by one, FeSO is all housed ₄the syringe 7 of solution is fixed on a plug 5, and then insert and fill in the A test tube 4 of ammonia at once, stoppered test tube 4, assurance device impermeability is good.

(2) separately get a test tube B and add a small amount of ammoniacal liquor, same, another is all equipped with to FeSO ₄the syringe 7 of solution is fixed on a plug 5, inserts this test tube 4 jam-packs.

(3) with iron stand by two test tube 4 fixed placement at sustained height, and place up a ruler 6, handled easily.

(4) depress ruler, by the FeSO in two syringes 7 ₄in solution while injecting tube 4, observation experiment phenomenon.

Experiment is found: by FeSO ₄after solution injecting tube 4, be full of in the A test tube 4 of ammonia and produce at once white precipitate, become immediately green, and the transition process of color is clearly visible, but there is no red-brown precipitation, generate; And the B test tube 4 of ammoniacal liquor is housed, and almost can't see white precipitate, splash into FeSO ₄after solution, produce at once green precipitate, be just transformed into red-brown precipitation for a moment; The plug of A test tube 5 is taken off, be placed in ventilation, after a period of time, just can be observed green precipitate and be transformed into red-brown precipitation.The utility model experimental provision is simple, easy to operate, producing in process of ferrous hydroxide guarantees in test tube without air residual with excess of ammonia gas, experimental design is rigorous, add the contrast experiment under same operation conditions, experimental phenomena is more obvious, and the design strong explanation ferrous hydroxide directly perceived of this experimental provision is white precipitate.

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

1. the experimental provision of a preparing hydrogen iron protoxide, comprise ammonia device for making and ferrous hydroxide device for making, it is characterized in that, described ammonia device for making comprises that tool props up test tube, separating funnel, plug, wireway and test tube, described separating funnel is installed on described tool by plug and props up test tube mouth of pipe place, one end of described wireway is connected with the arm that described tool props up test tube, and the other end is placed in inverted described test tube mouth; Described ferrous hydroxide is produced experimental provision and is comprised ruler, test tube, plug and syringe, and the syringe needle of described syringe is fixed on described plug.

2. the experimental provision of a kind of preparing hydrogen iron protoxide as claimed in claim 1, is characterized in that, described test tube and described syringe are two, and described plug is three.

3. the experimental provision of a kind of preparing hydrogen iron protoxide as claimed in claim 1, is characterized in that, described plug and described tool prop up the test tube mouth of pipe and the described test tube mouth of pipe all matches.