Volumetric flask

November 1, 2021

One of the most important and significant achievements that chemistry and physics have had is the volumetric flask, it was invented by the chemist Emil Erlenmeyer in 1861, the same year that the chemist also invented the Erlenmeyer flask . After enlightening himself in different theories such as Guanidine and the study of compounds such as lactone, wonderful ideas emerged that led him to invent this significant measuring instrument.

There is no doubt that this is a very useful tool for the advancement and discovery of many scientific studies, since the exact calculation that can be obtained with it provides characteristic and important data to those who use it.

This instrument from its beginnings was designed to be used in laboratories as a material to accurately measure volumes of liquids, but later it was considered an important instrument for mixing different solutions in which different elements intervene.

What is a Volumetric Flask?

The volumetric flask also known by the name of Fiola, is a glass container that is generally used in all physics and chemistry laboratories, with it exact measurements of liquid levels are made and to prepare mixtures that are to be use after a time of having been prepared.

It is a glass container with a long, narrow neck and a flat bottom. On the neck it has a mark known as the gauging name, which indicates the volume of liquid that the flask must contain, in order to facilitate and guarantee that the exact measurement of liquids with different variations is obtained.

The markings on the neck start from the pear-shaped base and extend across the narrow neck, in order to provide different types of volume measurements.

What is a Volumetric Flask for?

This instrument, although at first it was only used to accurately measure the volume of different liquids that can be found in a laboratory, it is also used to make mixtures of various elements to achieve a composition, but without overloading its function.

It is important to bear in mind that some flasks are only suitable for use in school laboratories, since they are much more basic and delicate , but there are many others that are made with different compositions and support greater capacity.

The most important thing before buying it is to determine what will be its use, in order to select the most suitable one, whether it is going to be used for mixing or for measuring.

How does a Volumetric Flask work?

To use this tool, it is only necessary to know which brands will be needed in order to obtain an accurate measurement of the volume or mixture to be measured. Its function is to measure the volume of the liquids that are used in any laboratory, however it can also be used to carry out any type of test or experiment.

The first and most important step that must be followed is to make up the mark, which is about filling the flask in the correct way, for this it is best to use a funnel since thanks to its thin and elongated peak it is easier to place inside the flask the liquid you want to measure without risking a spill, it will also offer you greater comfort and the measurement will be more accurate.

Another point to be clear about when starting to measure is the meniscus, the central point of the curve that manages to reach the solution , taking into account that many flasks have high edges and others have lower edges, but in any case it does. It is important to always keep your eye at the level of the capacity, since this is the highest level to which any liquid can be taken.

The capacity must be seen as a straight line, in this way the precise calculation of the liquid will be guaranteed, it must not be seen as an ellipse, if so , the expected result may not be obtained .

Uses of the Volumetric Flask

As you already know, the flask is an instrument that is currently not only used to measure the volume of any liquid but also serves to make mixtures that do not cause any damage to this material, this is how its uses can be divided So:

  • To measure volumes of liquids

The marks on the neck of the flask serve as a guide, when measuring the volume of liquid you will observe a curve either up or down , the shape of the curvature will depend on the kind of liquid you are measuring.

Due to the narrowness of the neck, measurement is facilitated, since any change that occurs in the volume of the liquid will be observed in the height of the meniscus.

  • To prepare solutions

The flask is also used in solutions in which you already have the knowledge of the amount of solute and solvent that are going to be mixed, for this you must measure the amount of solvent you will need in the flask, while the weight of the solute is determined on a balance.

Then the stopper is placed on the flask, so the components can be shaken and integrated without running the risk of the solution spilling .

This is an instrument that is graduated to contain at a certain temperature the amount of liquid that you have previously decided, the graduation mark surrounds the entire neck so that you will easily avoid errors that can be produced by the position from which you you observe. Remember when the fluid is brought up to the gauge, the eye must be aligned so that the edges of the ring are adjacent to the lower edge of the meniscus.

Types of Volumetric Flask

Flasks can be classified in three different ways for a more specific classification and definition even if there are only two types of flasks . They can be cataloged by precision, by volume capacity, and by color.

  • According to precision

When talking about the precision of the instrument, there are two types:

Type A : they are those that are not only used for the measurement of liquids, but also to prepare the different mixtures, they are generally the ones used in advanced chemistry laboratories .

Type B : are those found in school laboratories where the requirement is lower and are not used for strong compositions .

  • According to the volume capacity

When it comes to volume capacity, there are 1 and 2 ml flasks, however the most widely used and known are those ranging from 25 ml to 500 ml.

  • According to the color

Although they are generally made of transparent glass, they can also be found in different colors, this is to process mixtures that are sensitive to light .

Good hygiene should always be taken into account in any laboratory instrument regardless of its type, in this way the mixtures and measurements will not be affected or altered by any external agent.

Characteristics of a Volumetric Flask

This is a tool widely used in laboratories and is also known as volumetric flask , has a base or pear-shaped ball usually is made of glass, although ex isten some processed plastic. It has a long neck through which the liquids that are integrated into the instrument can be measured.

From its base to the neck, it has markings that allow the exact measurement of the volume of the compositions, as well as general information that must be taken into account when using it, such as the temperature at which it should be used , the capacity of the volume. to be measured and the manufacturer’s mark.

It also has a lid, in some cases made of plastic and in others made of cork, which serves to preserve the liquids in the container, mainly when it comes to mixtures, they can be found in different sizes, ranging from 25 ml to 500 ml and much more.

Importance of a Volumetric Flask

In chemistry and physics the flask is a super important tool, since it helps in the different advances, calculations and investigations that science has, in the hydrocarbon industry it also has a lot of relevance because it helps to separate the oil samples to determine its behavior with different solvents.

Undoubtedly this has been one of the most successful measurement instruments of recent times, its usefulness is not focused on a single purpose but on several, thus achieving a scope within physics, chemistry and their different approaches.

Giving you the opportunity to calculate volumes correctly as long as it is used properly in order to obtain correct results.

Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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