Volumetric Flask Definition in Chemistry
Mar 05, · This flask is a reaction vessel designed to perform chemical reactions which are sensitive to air. There are many variations for this, but usually it has two different necks or connections, one designed to put in the chemical reagents, and another one that is simply a connection to a Schlenk line, or source of an inert gas such as argon or nitrogen. Aug 04, · A volumetric flask is a type of laboratory glassware used to prepare solutions. A volumetric flask is a flat bottomed bulb with a elongated neck calibrated to hold a set volume at a mark on the neck. The flask may also be called a graduated flask or measuring flask because its mark specifies a precise volume measurement.
Flasks are useful types of chemistry glassware for containing liquid and performing mixing, heating, cooling, precipitation, condensation, and other processes. These flasks —also known as a science flask, chemistry flask, or a laboratory flask lab flask — come in a range of sizes, materials, and uses.
Commonly used types of chemistry flasks include:. An Erlenmeyer flask, conical flask, or E-flask is one of the most commonly used flasks in scientific laboratoriesbut what does an Erlenmeyer flask do? The flask has a conical base that almost extends into a small, cylindrical neck. This shape allows the flask to be sealed with a bung for heating purposes, while also allowing a researcher the freedom to shake or stir the flask without spilling liquid.
The Erlenmeyer flask has diverse uses such as holding and measuring chemical liquid samples, but can also be used to mix, heat and boil chemicals. The bottom is conical in shape, with a short neck from which the small tube extrudes. The entire flask is made of thick glass. The small side-arm tube is composed of a hose barb, which is a serrated section that how to able a disabled ipod a thick-walled flexible hose.
With the funnel on top of the glass neck and a tube sucking the pressure out of the side, vacuums for sluicing liquids can be created very easily within the flask. A fleaker is a portmanteau of the words flask and beaker, and physically resembles a combination of an Erlenmeyer flask and a beaker. The cylindrical body culminates in a neck that curves inward before flaring out in a rounded opening.
Fleakers are generally used for similar applications as Erlenmeyer flasks, but most often only for liquids. What is a Florence flask? A Florence, or boiling flask how to make an assessment report a large, round sphere with a long, thin neck and a slightly flared rim opening. The rounded design of the bottom is such that a Bunsen burner can easily heat the solution within.
Some Florence flasks are produced with rounded bottoms, and thus need support in order to stand upright; others have flat bottoms and can stand alone. Because they are so often used for boiling, Florence flasks are produced with borosilicate glass to prevent cracking.
A retort is a type of flask used primarily for distillation and its design is exclusive to this purpose. The retort resembles an exaggerated teardrop with the middle bent at almost a 90 degree angle. The bulb portion contains a liquid or chemical solution, which is heated to the point of condensation. The condensation then attaches to the roof of the retort, and as it begins precipitating, it runs down the angle of the long, thin point of the tear where there is another opening.
The liquid collects in a separate container. A Schlenk flask can be a round, pear-shaped or tubular bulb that stretches vertically into a long, thin neck with a side-arm. The side arm features a valve so that pressure or gas can be released from the flask. Volumetric flasks are flasks used to measure specific volumes of material.
They are generally graduated with metric markings to measure the volume of material in the container. They are typically composed of a round or pear-shaped bulb and a long thin neck topped by a stopper or rubber bung. Because the volumetric flask function is to generally be used for measurement or reactions and not heating or boiling, they can be made of plastic or glass.
What You Need to Know About Volumetric Flasks
Aug 04, · These flasks are used for filtering samples because the vacuum forces the filtrate into the flask, while residue remains on the filter paper in the funnel. The funnel used for . Aug 04, · An Erlenmeyer flask is used for the storing and mixing of chemicals in a laboratory setting. It is one of the most common flasks used within laboratories. The Erlenmeyer flask was created by Emil Erlenmeyer in the s to help scientists have a better way of mixing, pouring and storing chemicals. The flask has a flat bottom that makes it easy to place on a table or a flat surface.
A volumetric flask is a type of laboratory glassware used to prepare solutions. A volumetric flask is a flat bottomed bulb with a elongated neck calibrated to hold a set volume at a mark on the neck. The flask may also be called a graduated flask or measuring flask because its mark specifies a precise volume measurement. The mark on the flask neck indicates the volume contained. When emptied, some portion of liquid may remain in the container, so the mark unlike for a pipette does not indicate the amount to be dispensed.
Most volumetric flasks are either transparent glass or plastic, although some flasks are amber-colored for the preparation of light-sensitive solutions. The mouth of the flask may have either a joint to accommodate a stopper or a screw cap. All volumetric flasks are not created equal! There are higher and lower precision flasks. A volumetric flask made to conform to a high standard is a Class A or Class 1 flask.
Its tolerance, temperature, precision, and volume will be indicated on the glassware. A Class B flask does not conform to as high a standard and may not include all of this information. Class A flasks are used for analytical chemistry work, while Class B flasks are suitable for most educational and qualitative work.
Share Flipboard Email. Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels. Facebook Facebook Twitter Twitter. Updated August 04, Cite this Article Format. Helmenstine, Anne Marie, Ph. Volumetric Flask Definition in Chemistry. Chemistry Laboratory Glassware Gallery.
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