CN2247845Y

CN2247845Y - Experiment demonstrator for electrolysis of water

Info

Publication number: CN2247845Y
Application number: CN 95245574
Authority: CN
Inventors: 李吉军
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-11-07
Filing date: 1995-11-07
Publication date: 1997-02-19
Anticipated expiration: 2005-11-07

Abstract

The utility model relates to an experiment demonstrator for the electrolysis of water, which is used for chemistry teaching. The utility model is provided with two glass tubes which is inserted into a container containing Potassium hydroxide aqueous solution, and the lower ends of the glass tubes are provided with holes. The lower ends of the glass tubes are respectively provided with a positive and negative electrode made of wire, the electrodes are fixed on a support frame, and the electrodes are inserted in the lower end part of the glass tubes. The upper end of each glass tube is provided with a gas switch and a stainless steel burner tip. The utility model has the advantages that the leakage existing in the experimental demonstration by using the existing demonstrator for the electrolysis of water is eliminated; the reactive speed and the visibility of the reaction of phenomena are enhanced; the manufacturing cost is lowered at the same time.

Description

The Electrolytic Water Experiment apparatus for demonstrating

The utility model belongs to chemical experiment device, is a kind of Electrolytic Water Experiment apparatus for demonstrating that is used to impart knowledge to students.

The Huffman electrolysis unit is all adopted in the composition experiment of relevant water in existing junior middle school chemistry teaching.This device has three glass tubes that are interconnected, and wherein platinum electrode is equipped with in the lower end of two glass tubes, and switch and burner are equipped with in the upper end; Another glass tube is used for the gaseous tension that balance produces.The experimental provision of this brine electrolysis has the following disadvantages: 1. it can only select platinum electrode for use, and it costs an arm and a leg, so commercially available electrode diameter is very little, little with the contact area of water, thereby caused reaction velocity very slow, reacting phenomenon is not obvious, and once experiment generally needs 15～25 minutes; 2. electrode is fixed on and inserts the glass tube lower end on the rubber plug, and the solution leakage phenomenon easily takes place in use; The switch of glass tube upper end is the glass rotary switch, and its sealing is relatively poor, and can not use alkaline electrolyte, can only adopt acidic electrolysis bath.But the negative reaction of electrode is bigger in acidic electrolysis bath, and the hydrogen that reaction is generated and the volume ratio error of oxygen are also bigger; 4. adopt the glass burner can produce the interference of the yellow flame color of sodion, make the light blue distortion of oxyhydrogen flame.

It is low that the purpose of this utility model provides a cost, and reaction velocity is fast and reacting phenomenon obvious and help the Electrolytic Water Experiment apparatus for demonstrating of classroom instruction.

Solution of the present utility model is: the Electrolytic Water Experiment apparatus for demonstrating that is provided has two glass tubes, and the lower end of two glass tubes is respectively equipped with positive and negative electrode, and gas switch and burner are equipped with in the upper end.Improvements of the present utility model are: the lower ending opening of above-mentioned two glass tubes, and place a container that fills electrolytic solution, electrolytic solution adopts potassium hydroxide or sodium hydrate aqueous solution, above-mentioned positive and negative electrode adopts iron wire, they are fixed on the support, and are inserted in the bottom of glass tube.The utility model replaces the communicating pipe of Huffman electrolyzer to carry out pressure equilibrium with the version that glass tube inserts container, and adopt iron wire to make electrode, not only greatly reduce manufacturing cost, and metal wire electrode can be done slightlyer, increased the surface of contact of reaction, thereby improved reaction velocity, strengthened the ornamental of reacting phenomenon.

Compared with prior art, reaction velocity of the present utility model is very fast, and the bubbles volume of generation is big, and the flame color of oxyhydrogen flame is vivid, finishes once experiment and only needs time a few minutes.Owing to adopted the version in the glass tube insertion container, so the solution leakage phenomenon can not take place.In addition, the utility model has adopted alkaline electrolyte, so the electrode negative reaction is minimum, the hydrogen that reaction generates and the volume ratio of oxygen are accurate.

Below in conjunction with accompanying drawing content of the present utility model is illustrated.

Fig. 1 is a structure diagram of the present utility model.

Fig. 2 is the cut-open view at A-A place among Fig. 1.

As shown in Figure 1: glass container 1 adopts specimen bottle, and a grillage 2 is placed at its upper end open place.Two

glass tubes

3,4 adopt the poly-test tube in the end, and its upper end is fixed on the grillage 2, in succession one the electrode suppor 7 of electrode 5,6 is housed in the lower ending opening place, and the width of support 7 is less than glass tube internal diameter (see figure 2).Two electrodes 5,6 adopt the iron wire of 1～1.2mm diameter, and draw from grillage 2 by lead 8,9.Switch 12 is equipped with at upper end open place at two

glass tubes

3,4 respectively, it by emulsion tube 10 and in be loaded on emulsion tube glass bead 11 form, its sealing is fine.If will open switch 12, only with hand refers to that pinching glass bead 11 places get final product.Above switch 12, a burner 13 also is housed, the most handy stainless-steel tube of this burner, what adopt in this example is injection needle, can avoid in the glass burner sodion to the interference of hydrogen-oxygen flame color like this.

In order to increase the visibility in this device, an illuminating lamp 14 can be set below the bottom of above-mentioned glass container 1, this illuminating lamp is contained on the base 15 of glass container 1.

This device adopts 3～5% potassium hydroxide aqueous solution as electrolytic solution when experiment, and adding a little potassium hydroxide is in order to increase the electric conductivity of water.

Claims

1, a kind of Electrolytic Water Experiment apparatus for demonstrating, have two glass tubes (3,4), the lower end of two glass tubes (3,4) is respectively equipped with positive and negative electrode (5,6), gas switch (12) is equipped with in the upper end, the lower ending opening that it is characterized in that above-mentioned two glass tubes (3,4), and place a container (1) that fills electrolytic solution, electrolytic solution adopts potassium hydroxide or sodium hydrate aqueous solution, said positive and negative electrode (5,6) adopts iron wire, they are fixed on the support (7), and are inserted in the bottom of glass tube.

2, apparatus for demonstrating as claimed in claim 1, it is characterized in that said gas switch (12) by emulsion tube (10) and in be loaded on emulsion tube glass bead (11) form.

3, apparatus for demonstrating as claimed in claim 1 or 2 is characterized in that said burner (13) is a stainless-steel tube.

4, apparatus for demonstrating as claimed in claim 3 is characterized in that being provided with an illuminating lamp (14) in the below, bottom of said vesse (1).