Kinds of flasks: features, purpose

Labware is notable for its variety. It is used in the process of analysis in a variety of areas. A huge number of variations of the presented containers makes it possible to apply the most suitable variety in each particular case.

можно классифицировать по некоторым признакам. Existing types of flasks can be classified according to some criteria. This allows us to delve deeper into their application and significance for analysis. The varieties of laboratory glassware deserve special attention.

general characteristics

. In laboratory tests glass bottles are used most often. They allow you to perform many different operations and chemical reactions. A fairly large item of expenditure for any laboratory is the container.

Since most of the flasks are made of glass, they can beat. Today there are a variety of types of flasks. They can be exposed to temperatures or chemical reagents. Therefore, the material from which laboratory utensils are made, must withstand such loads.

The configuration of the flasks can be very unusual. This is necessary to conduct fully chemical experiments, as well as the analysis of the required substances. Most often, these containers have a wide base and a narrow throat. Some of them can be equipped with a cork.

Varieties of the form

. In laboratory studies, a flat-bottomed and round-bottomed flask may be used. These are the most commonly used varieties of tanks. Flat-bottomed varieties can be placed on a flat surface. Their purpose is very diverse.

Round-bottomed flasks are held by a tripod. This is very convenient if the container needs to be heated. In some reactions this speeds up the process. Therefore, a round-bottomed flask is most often made thanks to this special feature of heat-resistant glass.

Also, both presented varieties of laboratory glassware are used to store various substances. Sometimes, in very rare cases, in the course of a laboratory analysis, acute types of packaging are used.

Application of flasks and their configuration

очень разнообразны. Types of flasks and their names are very diverse. They depend on the scope of application. The Kjeldahl flask is characterized by a pear-like shape. It is most often used in the eponymous device for determining nitrogen. This flask may have a glass stopper.

For the distillation of various substances a Würz flask is used. In its design there is a branch pipe.

The Claisen's flask has two necks, the diameter of which is the same over the entire length. One of them is fed with a tube, designed to divert the steam. The other end communicates dishes with a refrigerator. This variety is used for distillation and distillation at normal pressure.

The Bunsen flask is used in filtering processes. Its walls are very strong and thick. Above there is a special process. It comes to the vacuum line. For experiments under conditions of reduced pressure, this species is ideal.

Erlenmeyer flask

нельзя не уделить внимание еще одной форме лабораторной посуды. Considering the existing types of flasks, one can not but pay attention to another form of laboratory glassware. The name of this container is given in honor of its creator - the German chemist Erlenmeyer. It is a conical container that has a flat bottom. Its neck is characterized by a cylindrical shape.

This flask has a division that allows you to determine the volume of the liquid inside. A unique feature of this type of container is the insert of a special glass. It's kind of a notebook. On it, a chemist can make the necessary notes.

The neck can be closed with a stopper if necessary. The conical shape promotes the quality mixing of the contents. A narrow neck prevents the spillage of the substance. The process of evaporation in such a container is slower.

A bulb of the type shown is used for titration, cultivation of pure crops or heating. If the bulb has divisions on the body, they are not heated. This dish allows you to measure the amount of substance content.

A few more features

The types of flasks used can also be divided into groups, depending on the type of throat. They are simple (for a rubber stopper), as well as with a cylindrical or conical section.

Depending on the type of material from which the dishes are made, it can be heat-resistant or conventional. On purpose, the flask can be divided into measuring tanks, receivers and reactors.

The volume of laboratory glassware is also quite diverse. Their capacity can range from 100 ml to 10 liters. There are even larger flasks. When working with a similar container, you must always follow the safety rules. Each type of equipment presented should be used strictly for its intended purpose. Otherwise, you can break the flask or harm your body.