Volumetric Flask, What is it and how to buy it?

November 2, 2021

Among the most significant and momentous achievements in the world of physics and chemistry is the volumetric flask . This was created by the chemist Emil Erlenmeyer in 1861. That same year he also created the Erlenmeyer flask. This magnificent invention comes after various theories were illustrated, including that of Guanidine, along with studies such as that of lactone. These studies lead to the creation of this important measuring instrument.

There is no doubt about the great utility of the volumetric flask in laboratories. Its use has allowed the advancement and discovery in many scientific investigations . This is thanks to the exact calculation provided by the volumetric flask, which provides specific and accurate data to those who use it.

Since its inception, the volumetric flask was created for the purpose of measuring liquid volumes within laboratories . However, some time later it was also considered a very useful instrument for mixing various solutions where there are the intervention of various elements.

What is a volumetric flask?

Also known as Fiola , the volumetric flask is simply a glass container used very frequently within chemistry and physics laboratories. This is used to carry out precise measurements of the levels of liquids to be used in the preparation of a mixture.

The design of the volumetric flask is as follows: a glass container with a flat base and a narrow, elongated neck. On the neck of the flask is a mark, known as the gauge . This indicates the volume of liquid allowed by the flask. Thanks to the capacity it is possible to guarantee that the exact measurement is always inside the container.

The markings on the neck start at the base of the flask, which is pear-shaped. This is extended along the neck with the intention of providing different types of volume measurements.

Where is it used?

The volumetric flask was originally used only for the precise measurement of the volume of different liquids used in a laboratory. Some time later this instrument began to be implemented in the realization of mixing of certain elements to obtain a composition, as long as the function was not overloaded.

It should be noted that some flasks are created to be used only in school laboratories . These are usually more delicate and basic. However, there are others that are manufactured with different compositions, having a greater capacity and resistance.

Therefore, before buying a volumetric flask, it is important to determine what function it will serve. In this way, it will be possible to acquire the most suitable one, whether it is going to be used for mixing or measuring.

How is the volumetric flask used?

Before starting to use this laboratory instrument, it is necessary to consider which brands will be needed to be able to achieve the exact measurement of the volume or mixture to be measured. The job of the flask is to measure the volume of the liquids to be used within the laboratory. However, this instrument can be used to carry out any type of test or experiment .

The first thing to do and the most important step to follow is to make the flask flush . This process consists of correctly filling the flask. For this, it is necessary to have a funnel because its thin and elongated spout facilitates the work of pouring the liquid into the volumetric flask, preventing a spill from occurring. Likewise, using a funnel provides added convenience and will help make the measurement much more accurate.

Another aspect to take into account when starting the measurement is the meniscus . It is the center point of the curve that the solution reaches. Note that many flasks have low rims, while others have higher rims. However, whatever the case, the fundamental thing at this point is to always keep your eyes at the height of the capacity . It must be remembered that this is the highest level where any liquid can be carried.

When you see the capacity, it should be seen as a straight line. This ensures precision when calculating the liquid. If the capacity is observed in the shape of an ellipse, the result obtained is probably not what is expected .

Various uses of the volumetric flask

The volumetric flask is not only a laboratory instrument for measuring the volume of a liquid. Today it is also used to make mixtures and avoid any alteration in it. This makes the flask can be used to:

Measure volumes of liquids

The markings found on the neck of the flask function as a guide to measure the volume of a liquid. To do this, you will see a curve that can be downward or upward. Depending on the type of liquid you measure, the curve will vary.

Thanks to the narrow neck, measurement is made much easier. This is because any change in fluid volume can be seen immediately at the meniscus .

Prepare solutions

On the other hand, the volumetric flask is also often used in solutions where the amount of solvent and solute to be mixed is already known. To carry out this process, the amount of solvent to be used must be measured in the flask and, as for the weight of the solute, it must be established using a balance.

Then, the solute is added to the flask and it is covered with a stopper to begin stirring it. In this way it is possible to integrate the materials preventing the solution from spilling.

This instrument has been manufactured so that the poured liquid maintains a specific temperature. The graduation mark is around the neck, which makes it less possible for you to make a mistake when observing the flask. Always keep in mind that each time the liquid reaches the volume of the flask, it must be aligned with the eye , so that the edges of the ring are adjacent to the lower edge of the meniscus.

Volumetric flask types

There are three ways to classify flask types, which provide a more precise classification and definition of this laboratory instrument. However, there are only two types of volumetric flasks that can be classified according to their precision, their volume capacity, and their color.

According to the precision

Regarding the precision of the volumetric flask, we can mention two types:

  • Type A: These are the ones that, in addition to being used for the measurement of liquids, are also used for the preparation of various mixtures. This type of volumetric flask is the most widely used in advanced chemistry laboratories.
  • Type B: This type of flask is commonly used in school laboratories where the demands of use are lower. They are not instruments prepared for strong compositions.

According to the volume capacity

Regarding the volume capacity, the flasks are manufactured with capacities of 1 and 2 ml. However, the most popular volumetric flasks are those with capacities from 25ml to 500ml.

According to the color

Flasks are generally made of clear glass. However, it is possible to find colored flasks. These are made in order to process mixtures with high sensitivity to light.

Good hygiene must be maintained at all times on all laboratory instruments, regardless of their type. This practice will ensure that mixtures and measurements are not altered or damaged by external agents.

Characteristics of the volumetric flask

Within physics and chemistry laboratories, the volumetric flask is a widely used tool. In addition to its name, it is also known as a graduated ball , since its base is shaped like a pear or ball. This laboratory instrument is usually made of glass. However, there are volumetric flasks made of plastic. This has a long neck that allows the measurement of the liquids poured into it.

Certain markings can be found from the bottom of the flask to the neck that allow the volume of the poured composition to be accurately measured. At the same time, it offers general information which is important to consider when using the flask. For example, the flask indicates at what temperature it should be used, how much volume capacity it has, and the manufacturer’s brand.

It usually also has a lid. This can be, depending on the case, made of cork or plastic. The purpose of the flask cap is to keep the liquid in the container , especially if it is a mixture.

Because it is important?

Within physics and chemistry, the flask is a very useful instrument. Its application within research allows more precise calculations to be obtained , making progress in studies. Within the hydrocarbon industry, the flask has a lot of relevance since it is essential when separating oil samples to define its behavior before different solvents.

We cannot doubt the great precision that the volumetric flask provides, which makes it one of the best measuring instruments of our time . In addition, its use is not only limited to a single task, it can be very useful thanks to its versatility. Reason enough to achieve a great reach in the world of physics and chemistry.

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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