What Is A VOLUMETRIC FLASK: Use, Function, Feature

A volumetric flask is a kind of laboratory glassware. It is used to maintain and measure accurate amounts of liquid. It has the shape of a Florence flask, but has a flatter bottom. A volumetric flask has a high, narrow neck with a stopper that can be used to close the opening at the top.

There is a line on the neck to show how much the flask should be filled. Volumetric flasks are made in many sizes - from a few milliliters to liters. They are often used to make liquid solutions. The neck is narrow to make more accurate measurements when making a solution.

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🌡 What is the use of the flask?

A flask is a piece of laboratory glass used to prepare and measure chemical solutions. It is used to make a solution to a known volume. Volumetric flasks measure volumes much more accurately than beakers and Erlenmeyer flasks.

⭐ How to recognize a flask

A volumetric flask is characterized by a bulb and a long neck. Most volumetric flasks have flattened bottoms so that they can be placed on a laboratory bench or other surface, although some volumetric flasks have rounded bottoms and must be handled with special protective equipment.

📌 How to use a flask

To prepare a solution in a volumetric flask, follow these steps:

* Measure and add the solute for the solution.
* Add enough solvent to dilute the solute.
* Continue adding solvent until it approaches the marked line on the volumetric flask.
• Use a pipette or dropper to fill the volumetric flask, using the meniscus of the solution and the line on the flask to determine its endpoint.
* Seal the volumetric flask and invert it to mix the solution well.

🧬 What is the use of the ball flask?

It is a kind of flask that is used as a laboratory glassware item. It is used as a container for holding liquids. A Glass flask has a round body, a long neck and often a flat bottom. It is designed for uniform heating, boiling, distillation and ease of turning.

It is manufactured in different thicknesses of glass to withstand different types of use. They are often made of borosilicate glass for heat and chemical resistance. Traditional Florence flasks generally do not have a frosted glass gasket on their longer necks, but typically have a light lip or rim around the tip of the neck. The common volume for a Glass flask is 1 liter.

👉 What is the chemistry course?

A capacity is a circular footprint stamped precisely on the glass of the volumetric instrument to indicate that this is the determined volume. However, we have the case of double capacity, which has an additional line in this opportunity the defined measure is the one established in the middle of both margins

The number of tanks, the accuracy in the precision of the measurements of a tank is a very considerable factor to know the volume of the solution if we keep in mind the consequences that keep incorrect measurements in an erroneous fitting table, which tends to remain in use for a long period of time before the error is indicated.

🌡 When was the volumetric flask invented?

Pyrex has its origins in the early 1910s, when the American glass company Corning Glass Works began looking for new products to present its borosilicate glass, Nonex. At the suggestion of Bessie Littleton, the wife of a Corning scientist, the company began researching Nonex for baking.

After removing the lead from Nonex to make the glass safe for cooking, they called the new formula "Pyrex" – "Py" for the cake plate, the first Pyrex product. In 1916 Pyrex found another market in the laboratory. It quickly became a favorite brand in the scientific community for its resistance to chemicals, thermal shock and mechanical stress.

This object is part of a collection donated by Barbara Keppel, wife of C. Robert Keppel. Robert Keppel taught at the University of Nebraska-Omaha after receiving his B.S. in chemistry from the University of California, Berkeley, and his Ph.D. in organic chemistry from M.I.T. The glassware in the Keppel collection spans the nineteenth and early twentieth centuries.

⭐ Volumetric flask capacity

The volumetric flask, available in sizes ranging from 1 mL to 2 L, is designed to hold a specific volume of liquid, usually with a tolerance of a few hundredths of a milliliter, about 0.1% of the capacity of the flask. The flask has a calibration line engraved on the narrow part of its neck. It is filled with liquid, so the lower part of the meniscus is on this engraved line. The calibration line is specific to a given flask; a set of flasks built to hold the same volume will have lines in different positions.

🧪 importance of correctly filling a volumetric flask

When performing a measurement with laboratory instruments, two types of errors can be incurred, errors due to excess and errors due to default unfailingly. Errors in measurements can be minimized by increasing the appreciation of the measuring instruments

In the laboratory, as a rule, excess measurements are carried out to ensure that there is a sufficient amount of sample for the experiment. The correct technique to trace a liquid, with the exception of liquid mercury, is to match the meniscus valley of the liquid with the capacity line (excess measurement). and never the ridges of the meniscus of the liquid with the capacity line. (default measurement

📌 Volumetric flask precautions

* The pipette should never "hold" on the bulb.
* the pipette should "never" be used to extract strong acid or base.
• We must never blow the last drop attached to the pipette nozzle.
* The conical flask must not be rinsed with the solution to be filled.
* The base must be taken in the conical flask and the acid in the burette (for titrations).
* The volumetric flask should "never" be used to measure solutions.

🧬 Erlenmeyer flask use

Also called as conical flask (titration flask), it is a kind of laboratory flask that is characterized by having a flat bottom, a conical trunk and a cylindrical neck.

Erlenmeyer flasks have wide bases, with edges that contract upwards to a short perpendicular neck. They can be graduated, and often frosted glass or enamel stains are used where they can be labeled with a pencil. It differs from the beaker in its conical body and narrow neck.

The mouth of the Erlenmeyer flask may have a molded lip that can be stopped or covered. Alternatively, the neck can be equipped with ground glass or another connector for use with more specialized plugs or for attachment to other appliances.

* The conical edges and the reduced neck of the flask allow the contents of the flask to be combined by shaking it, without danger of spills.
• While the titration is being performed, it is placed under the burette.
* Their reduced necks also manage to withstand filter cones.
• They are used in microbiology for the preparation of microbial cultures.
• It can also be used to measure the volume of liquids. But this is not recommended for very accurate volume measurements.
• The mouth of the flask can be closed with a cork to prevent gaseous substances from escaping. These can be stored in the flask.

The reduced necks of the flasks can also hold the filter funnels. The last two characteristics of the flasks basically make them suitable for re-crystallization. The specimen to be purified is heated to a boil and enough solvent is added to complete the dissolution. The receiving flask is filled with a tiny portion of solvent and heated to a boil. Its stamped volumes are approximate with an accuracy of about 5%.

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