CN205258638U

CN205258638U - Device of copper ion direct oxidation sulphion

Info

Publication number: CN205258638U
Application number: CN201521045894.2U
Authority: CN
Inventors: 李大塘; 谢慧翔; 龙承韵; 申云萍; 邓望; 孙冉
Original assignee: Hunan University of Science and Technology
Current assignee: Hunan University of Science and Technology
Priority date: 2015-12-16
Filing date: 2015-12-16
Publication date: 2016-05-25
Anticipated expiration: 2025-12-16

Abstract

The utility model discloses a device of copper ion direct oxidation sulphion and method. The utility model discloses a two test tubes of the no end have been put to little beaker in the little beaker, saturated potassium chloride agar fluid is equipped with in the little beaker, two test tubes of no end frozen glue back cover after by the solidification of saturated potassium chloride agar fluid, pack into respectively in two test tubes of the no end copper sulphate solution and vulcanized sodium solution, an inert electrode is respectively connected at wire both ends, inserts these wire both ends inert electrode respectively in the copper sulphate solution and vulcanized sodium solution of two test tubes of the no end. The electrode lower part terminal surface that inserts copper sulphate solution has obvious red solid, and this kind of solid is copper ion cu2+ by the metallic copper cu after restoreing promptly, the flavescence gradually of vulcanized sodium solution colour, this kind of yellow are sulphion S2 - and are become elemental sulfur S by the oxidation, many sulphions sn2 -'s that elemental sulfur S generated with sulphion S2 - slow reaction again colour. The utility model discloses the good reliability, the phenomenon is obvious, and the medicine material is easy, and the device is simple, and the security is strong.

Description

The device of copper ion direct oxidation sulphion

Technical field

The utility model belongs to technical field of chemistry and chemical engineering, is specifically related to a kind of copper ion direct oxidation sulphionDevice.

Background technology

In chemical theory, electrode potentialHigher than0.508V, principle, mixes copper-bath Cu with sodium sulfide solution²⁺Direct oxygenChange S^2-Become elemental sulfur S and self be reduced to metallic copper Cu: Cu²⁺+S^2-=Cu+S. But in experimentBasic do not have redox reaction can not occur yet, but precipitation reaction has occurred: Cu²⁺+S^2-＝CuS↓(black), this chemical reaction can be referring to: 1. Beijing Normal University, Central China Normal University, Nanjing is pedagogical largeLearn inorganic chemistry [M], the 3rd edition, Beijing: Higher Education Publishing House,, the 791st page in 1993. 2.Jilin University, Wuhan University, Nankai University, inorganic chemistry (volume two) [M], the 3rd edition, Beijing: heightDeng education publishing house, 2015, the 608th page. 3. Jilin University, Wuhan University, Nankai University, inorganicChemistry (volume two) [M], the 2nd edition, Beijing: Higher Education Publishing House,, the 556th page in 2010. 4.Wuhan University, Jilin University, inorganic chemistry (volume two) [M], the 3rd edition, Beijing: Higher education publishingSociety, 2004, the 835th page. Obviously, this reacting phenomenon is faster than redox because of precipitation reaction speedThe cause of reaction rate, facts have proved, is to realize Cu by prior art²⁺Direct oxidation S^2-.

Summary of the invention

The purpose of this utility model is to provide a kind of device of copper ion direct oxidation sulphion.

Above-mentioned purpose of the present utility model realizes by the following technical solutions: the direct oxygen of this copper ionThe device of changing sulphion, it comprises a small beaker, is placed with two bottomless test tubes in small beaker; In small beakerSaturated potassium chloride agar fluid is housed, the frozen glue of two bottomless test tubes after by saturated potassium chloride agar fluid solidifiesBack cover; In two bottomless test tubes, be respectively charged into copper-bath and sodium sulfide solution; The two ends of a wireRespectively be connected with an inert electrode, the two ends inert electrode of this wire inserted respectively to the sulphur of two bottomless test tubesIn acid copper solution and sodium sulfide solution.

Further, be connected with a galvanometer in the centre of described wire.

Further, be connected with a voltmeter in the centre of described wire.

Concrete, described inert electrode is graphite electrode or platinum electrode.

The utility model has solved the problem of copper ion direct oxidation sulphion effectively, not only contributes to from reasonIn opinion with in experiment, fully realize the chemical property of copper ion and sulphion, and be production, life, scientific researchProvide strong experimental basis with teaching, be also effectively to cultivate Students ' Creative Thoughts consciousness and creation energy simultaneouslyPower has increased example. The utility model reliability is strong, favorable reproducibility, success rate are high; Phenomenon is obvious, richIndividual character; Medicine, material are easy to get; Simply, simple operation, high safety, also can realize useless for instrument, deviceThing resource; And can be applicable in the production fields such as battery.

Brief description of the drawings

Fig. 1 is the structural representation of the utility model embodiment device.

Detailed description of the invention

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

Referring to Fig. 1, the device of the present embodiment copper ion direct oxidation sulphion comprises small beaker 1, small beakerIn 1, be placed with two bottomless test tubes 2; The saturated potassium chloride agar fluid 3 of 5cm height is housed in small beaker 1,Frozen glue back cover after two bottomless test tubes are solidified by saturated potassium chloride agar fluid 3; At two bottomless test tubes 2In be respectively charged into copper-bath 4 and the saturated sodium sulfide solution 5 that concentration is 1mol/L; The two ends of wire 6Respectively be connected with a graphite inert electrode 7, the two ends inert electrode 7 of this wire 6 is inserted respectively to two nothingsIn the copper-bath 4 and sodium sulfide solution 5 of end test tube 2. As can be seen from Fig. 1, connecting two inertiaIn wire 6 between electrode 7, connect a galvanometer 8, experimentation shows have electric current to pass through in circuit,And the sense of current is to the electrode that immerses sodium sulfide solution by the electrode stream that immerses copper-bath.

Method and the process of the present embodiment copper ion direct oxidation sulphion are as follows:

The CuSO that to take concentration that 20ml prepares be 1mol/L₄The Na that solution and 20ml are saturated₂S is moltenLiquid, adds respectively two to be placed in small beaker 1 with the frozen glue back cover after saturated potassium chloride agar fluid solidifiesIn bottomless test tube 2. Connect after graphite inert electrode 7 at wire 6 two ends, two inert electrodes 7 respectivelyInsert the CuSO in bottomless test tube 2₄Solution and Na₂In S solution, observe the face of solution in bottomless test tube 2The phenomenon of look variation and electrode. Experimental result shows, slowly carries out Na along with reacting₂S solution is by colourlessBecome gradually light yellow, along with the prolongation of time, color gradually obviously deepen. This is that oxidation has occurred electrodeReaction: S^2-—2e^-=S, the S in S and solution that oxidation produces^2-Reaction:(nValue hour is yellow). And be placed on airborne sodium sulfide solution (control experiment) still for colourless molten simultaneouslyLiquid, illustrates above-mentioned generated yellowNot S^2-Because of airborne O₂Be oxidized to S, S again with S^2-Due to reaction. Though find in experiment that the color of copper-bath is originally without significant change, after 1h, insert sulfuric acidThe electrode lower end surface of copper solution has the solid of obvious redness, and this solid is metallic copper Cu through inspection,As time goes on, also there is red solid in electrode lower side, and more and more, and Cu is described²⁺Be reduced: Cu²⁺+2e^-=Cu. In the wire of 7 of two inert electrodes, connect a galvanometer 8,In circuit, have electric current to pass through, and the sense of current is molten to immersing vulcanized sodium by the electrode stream that immerses copper-bathThe electrode of liquid, thereby successfully realized Cu²⁺Direct oxidation S^2-Object: Cu²⁺+S^2-＝Cu+S。

Claims

1. a device for copper ion direct oxidation sulphion, is characterized in that: it comprises a small beaker,In small beaker, be placed with two bottomless test tubes; Saturated potassium chloride agar fluid is housed, two bottomless examinations in small beakerThe frozen glue back cover of pipe after by saturated potassium chloride agar fluid solidifies; In two bottomless test tubes, be respectively charged into sulfuric acidCopper solution and sodium sulfide solution; The two ends of a wire are respectively connected with an inert electrode, by two of this wireEnd inert electrode inserts respectively in the copper-bath and sodium sulfide solution of two bottomless test tubes.

2. the device of copper ion direct oxidation sulphion according to claim 1, is characterized in that:The centre of described wire is connected with a galvanometer.

3. the device of copper ion direct oxidation sulphion according to claim 1, is characterized in that:The centre of described wire is connected with a voltmeter.

4. the device of copper ion direct oxidation sulphion according to claim 1, is characterized in that: instituteStating inert electrode is graphite electrode or platinum electrode.