A common glass instrument in chemistry laboratory was invented by German chemist Richard Erlenmeyer in 186 1. Generally used in titration experiments. In order to prevent the titration solution from overflowing and causing experimental errors, the bottle was placed on a magnetic stirrer.
It can be used to make gas or as a reaction container in general experiments. Its conical structure is relatively stable and not easy to topple.
2. jars
A jar is a glass container for solid reagents, which is transparent and brown. Brown bottles are used to hold reagents (such as silver nitrate) that need to be protected from light. Wide-mouth bottles are generally used to store reagents, and the inside of the bottle mouth is frosted to match the bottle stopper.
3. Evaporating dish
An evaporating dish is a container that can be used to evaporate concentrated solution. It can be heated directly on a tripod, or indirectly with asbestos mesh or water bath. When heating, glass rods can be used to stir. Common specifications are 6, 9, 12, 18 cm, etc.
Different specifications can be selected according to different purposes. Evaporating dishes are generally porcelain products, but also made of glass, timely, platinum or copper. Different materials have different corrosion resistance and should be selected according to the properties of solutions and solids. Good stability to acid and alkali. It can withstand high temperature, but it is not suitable for quenching.
4. Alcohol lamp
Alcohol burner is a heating tool with alcohol as fuel, which is widely used in laboratories, factories, medical treatment, scientific research and so on. Because it does not produce smoke during combustion, it can also achieve the purpose of sterilization through combustion instruments. Due to the heat generated in the combustion process of alcohol lamp, other experimental materials can be heated
The heating temperature is above 400- 1000℃. And is safe and reliable. Alcohol lamps are divided into hanging alcohol blowtorch and sitting alcohol blowtorch, as well as the conventional alcohol lamps mentioned in this paper. Generally speaking, glass is the most commonly used material in the laboratory.
Step 5 drop the bottle
When the amount of liquid chemicals used at one time is small or dangerous, drop bottles are usually used to hold the solution. Usually liquid acid-base indicator is used for dropping bottles. The inside of the bottle mouth is frosted, similar to a narrow-mouthed bottle, and the bottle cap part is replaced by a dropper. Most containers used to hold a small amount of liquid are used in the laboratory.