The question of alcohol lamps, can alcohol lamps be used directly with alcohol lamps?

The amount of alcohol in the alcohol lamp meets the requirements, but it still can't be lit, it may be that the alcohol has volatilized for a long time, and what is left at the wick is water, so it can't be lit. Then there's the wick problem. You can also pull the wick out slightly, cut off the burnt one, and then drink some alcohol.

1。Problems with cotton threads, such as burning.

2。Pull the cotton thread outward a bit.

I guess it should be the wick problem, 1Change the wick (i.e. a strip of cloth) 2It would be nice to pull the wick out a little, but not too long.

No, absolute ethanol, directly lit with an alcohol lamp, you need to add water, and the general alcohol content is 65---90.

Anhydrous ethanol is high-purity alcohol, so the theory of wine is that absolute ethanol can be used, but high-purity alcohol is highly volatile and may be dangerous, so it is recommended to use alcohol.

Because the wick of an alcohol lamp using 95% ethanol does not ignite, it is because the alcohol is impure and contains water that prevents it from burning. Anhydrous alcohol has the potential to cause the core to burn and produce carbon black, and carbon can be analyzed due to combustion failure.

Main uses: In chemical experiments, alcohol lamps are commonly used for low-temperature heating. However, when experiments such as "charcoal reduction of copper oxide" require high temperatures, it is difficult for alcohol lamps to be effective.

In addition, when the alcohol lamp is used for the flame color reaction, the yellow flame of the alcohol lamp will also interfere with the experimental phenomenon. How to increase the temperature of the flame of the alcohol lamp and eliminate the yellow color of the flame of the alcohol lamp is a major problem in the teaching of chemistry experiments in middle schools.

1. You must use a lit match to light the alcohol lamp, and you must not use one alcohol lamp to light another alcohol lamp. Otherwise, it is easy to spill the alcohol and cause disaster.

2. If there are no special requirements when heating, the external flame is generally used to heat the appliance. The distance between the heating appliance and the flame should be appropriate, too high or too low is not correct. The distance from the flame is usually adjusted by the height of the lamp's skids or hoops.

3. When the flame needs to be extinguished after heating or adding alcohol to the section, you can use the lamp cap to extinguish it, if it is a glass lamp cap, you need to re-cover it again after the cover is extinguished, let the alcohol vapor go, and let the air enter, so as not to cause negative pressure in the cover after cooling and the cover cannot be opened.

4. The alcohol lamp must be covered with a lamp cap to avoid the volatilization of alcohol, because the alcohol in the alcohol lamp is not pure alcohol, so after volatilization, there will be water on the wick, so that the alcohol lamp cannot be ignited.

5. When the alcohol lamp is not in use, the lamp cap should be covered. If not used for a long time, the alcohol in the lamp should be poured out to avoid volatilization; At the same time, a small paper strip should be clamped between the lamp cap and the lamp neck to prevent adhesion.