CN202366686U - Gas measurement device for chemical reactions - Google Patents

Abstract

The utility model discloses a gas measurement device for chemical reactions, solving the problem that experiments are usually failed because magnesium rods are difficult to prevent from sliding off a test tube in a pre-operation process of gas measurement experiments such as gas constant measurement. The gas measurement device is characterized in that a small test tube 5 is inserted in a bent test tube 4 at the bottom, and the bottom end of the small test tube is contacted with the bottom of the bent test tube 4; 2/5 of the tube wall of the small test tube 5 is cut off as a feed inlet at a part of 1/7 to 4/7 from the bottom end of the small test tube 5; the orifice of the bent test tube 4 is sealed and connected with an outer wall ground port on the upper part of the small test tube, and the orifice of the small test tube 5 is connected with one end of a rubber tube 3, while the other end of the rubber tube is connected with a gas measurement tube; and the gas measurement tube and the lower end of a water level tube are connected by using another tuber tube 3. According to the gas measurement device, gas measurement experiments of reacting flaked solid with liquid can be smoothly carried out, and gas measurement experiments of reacting massive (or powdered) solid with liquid or reacting liquid with liquid can also be carried out.

Description

Chemical reaction amount device of air

One, technical field

The utility model relates to labware, relates in particular to the measurement mechanism that a kind of chemical reaction produces gas flow.

Two, background technology

Measure in the experiment of equivalent gas in gas constant; Dilute sulfuric acid is added the test tube bottom, and magnesium rod soaks and is attached to (note: the operating process in early stage is not stained with dilute sulfuric acid and is stayed on the test tube wall, does not let magnesium rod slide from test tube wall) on the test tube wall; Be connected to test tube on the eudiometer tube jam-pack rubber stopper.Transfer to same horizontal plane to the liquid level of the liquid level of levelling tube and eudiometer tube, write down the initial reading of eudiometer tube liquid level.The inclination test tube lets dilute sulfuric acid contact with magnesium rod and produces gas.Liquid level in the eudiometer tube descends immediately.Too big for fear of system's inside and outside differential pressure, levelling tube also should correspondingly move down, and keeps maintaining an equal level with the liquid level of eudiometer tube.When the magnesium rod complete reaction, after test tube cooled off fully, the liquid level of maintenance dose tracheae and levelling tube was write down the reading of liquid level in the eudiometer tube on same horizontal plane, and write down temperature and atmospheric pressure when testing.Above-mentioned operating process in early stage is difficult to the control magnesium rod not from the test tube wall landing, usually makes the failure of an experiment.If the reaction of piece (or powder) shape solid and liquid or liquid and liquid reactions can't experimentize with said apparatus.

Three, summary of the invention

The purpose of the utility model is exactly for the reaction that a kind of (or piece, powder) shape solid and liquid are provided or liquid and the liquid reactions amount of the carrying out gas device of testing smoothly.The technical scheme that the utility model adopted is: in vitro insert a small test tube in bottom bend; Make the small test tube bottom contact crooked test tube bottom,, the tube wall of small test tube is cut away 2/5 make charge door at 1/7 to 4/7 position apart from the small test tube bottom; The crooked test tube mouth of pipe and the sealing of small test tube external wall of upper portion ground are joined; The small test tube mouth of pipe connects rubber tube one end, and the rubber tube other end is connected with eudiometer tube, and eudiometer tube is connected with another root rubber tube with the levelling tube lower end.

The utlity model has following advantage and beneficial effect: only on the basis of original experimental provision, in vitro insert a small test tube, the small test tube tube wall is cut away part, the amount gas experiment of chip solid and liquid reactions is carried out smoothly in bottom bend.Can also carry out the amount gas experiment of piece (or powder) shape solid and liquid reactions or liquid and liquid reactions.

Below in conjunction with accompanying drawing the utility model is done further explain.

Four, description of drawings

Fig. 1 is the utility model chemical reaction amount device of air figure;

Among the figure 1, levelling tube, 2, eudiometer tube, 3, rubber tube, 4, crooked test tube, 5, small test tube.

Five, the specific embodiment

As shown in Figure 1; On the basis of basic facilities such as original experiment levelling tube 1, eudiometer tube 2, rubber tube 3, in bottom bend test tube 4, insert a small test tube 5, make small test tube 5 bottoms contact crooked test tube 4 bottoms; At position apart from small test tube 5 bottoms 1/7 to 4/7; The tube wall of small test tube 5 is cut away 2/5 make charge door, crooked test tube 4 mouths of pipe and the sealing of small test tube 5 external wall of upper portion grounds are joined, and small test tube 5 mouths of pipe connect rubber tube 3 one ends; Rubber tube 3 other ends are connected with eudiometer tube, and eudiometer tube is connected with another root rubber tube 3 with the levelling tube lower end.When implementing the utility model, press Fig. 1 eudiometer tube 2 is connected with small test tube 5 usefulness rubber tubes 3 with levelling tube 1, small test tube 5 is inserted crooked test tube 4.Add water with funnel, whether check system leaks gas.If gas leakage will check whether interface is tight, till device is air tight.Then; Take off crooked test tube 4; Reactant liquor is added crooked test tube 4 to bend pipe near being full of, sheet (or piece, powder) shape reactant or another reactant liquor are added small test tube 5 bottoms, again small test tube 5 is inserted (being seated) crooked test tubes 4; Transfer to same horizontal plane to the liquid level of the liquid level of levelling tube and eudiometer tube, write down the initial reading of eudiometer tube liquid level.The oblique bending test tube lets a small amount of reactant liquor get into the small test tube bottom, and gas is emitted in reaction, and the liquid level in the eudiometer tube descends immediately.Too big for fear of system's inside and outside differential pressure, levelling tube also should correspondingly move down, and keeps maintaining an equal level with the liquid level of eudiometer tube.Substep lets crooked test tube 4 reactant liquors get into small test tube 5, treat that most of reactant reacts in the small test tube 5 after, let crooked test tube 4 reactant liquors be full of small test tube 5 bottoms and make it complete reaction.After test tube cooled off fully, the liquid level of maintenance dose tracheae and levelling tube was write down the reading of liquid level in the eudiometer tube on same horizontal plane, and write down temperature and atmospheric pressure when testing.

Claims (1)

1. chemical reaction amount device of air; It comprises levelling tube, eudiometer tube and rubber tube, it is characterized in that: in bottom bend test tube (4), insert a small test tube (5), make small test tube (5) bottom contact crooked test tube (4) bottom; At position apart from small test tube (5) bottom 1/7 to 4/7; The tube wall of small test tube (5) is cut away 2/5 make charge door, crooked test tube (4) mouth of pipe and the sealing of small test tube (5) external wall of upper portion ground are joined, and small test tube (5) mouth of pipe connects rubber tube (3) one ends; Rubber tube (3) other end is connected with eudiometer tube, and eudiometer tube is connected with another root rubber tube (3) with the levelling tube lower end.

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