There is a difference between a high school chemical bottle and a grinding bottle.
1, the mouth of the cup is smooth, and the mouth of the two grinding bottles is rough.
2, the characteristics of different fine mouth convenient liquid dumping, and can avoid volatilization of reagents, so small mouth. The ground glass bottle will be tightly attached to the chemical reagent to prevent the reagent from escaping or air entering. Reason: the glass bottle containing chemical reagents needs good sealing, and the glass bottle with ground mouth can increase the friction in the case of dry bottle mouth, which also increases the fit degree of the bottle stopper, which is not easy to loose, since it is not easy to loose, then the natural sealing is good. Extended data: Note: 1, can not be used for heating. 2, when using the reagent, the bottle stopper should be placed on the table upside down, after use, the stopper will be tightly sealed if necessary. Because the inside of the bottle mouth is frosted and matched with the glass frosted plug, it can not hold strong alkaline reagents. If containing alkaline reagents, use rubber plugs instead.
3. The label should be flushed out when placed.
4, when the label is poured, the residual liquid will not corrode the label.
5. Put the cork on the table upside down when taking it off. For example: 1, liquid bromine is toxic and volatile, must be put in a fine mouth bottle with ground mouth, and add some water (water covers the liquid bromine) to play a water seal role. 2. Iodine is easy to sublimate and has a strong pungent smell. It is placed in a wide-mouth bottle with ground mouth.