What is the function of an Erlenmeyer flask?
What is the function of an Erlenmeyer flask?
Erlenmeyer Flask Used to hold and mix chemicals. The small neck is to facilitate mixing without spilling.
What is the use of flask in laboratory?
Flasks can be used for making solutions or for holding, containing, collecting, or sometimes volumetrically measuring chemicals, samples, solutions, etc. for chemical reactions or other processes such as mixing, heating, cooling, dissolving, precipitation, boiling (as in distillation), or analysis.
Which is the best reason for using an Erlenmeyer flask?
the erlenmeyer flask is the only container that can hold a liquid. the erlenmeyer flask’s narrow mouth makes it easier to pour the solution. the erlenmeyer flask’s narrow mouth can support the funnel and prevent breakage.
Why is an Erlenmeyer flask used for titrations?
The Erlenmeyer flask offers a slight advantage in accuracy due to its tapered sides. The size of the beaker or flask should be chosen to allow for more liquid to be added during the titration process. This makes it simpler than subtracting once the titration is complete. There is a valve at the bottom of the burette.
Why is an Erlenmeyer flask not accurate?
Beakers and Erlenmeyer flasks should not be used to measure volume unless you need only a very crude estimate because their accuracy for volume measurements is so poor. They can hold a much larger volume than any of the other types of glassware, however, which makes them useful for mixing solutions.
What does Erlenmeyer flask mean?
Medical Definition of Erlenmeyer flask : a flat-bottomed conical flask whose shape allows the contents to be swirled without danger of spilling. Comments on Erlenmeyer flask.
What are characteristics of an Erlenmeyer flask?
Erlenmeyer flasks are recognizable from their basic characteristics: flat bottom, conical body, and long, cylindrical neck. They are named for German chemist Emil Erlenmeyer.
What is the purpose of swirling the flask?
The slanted sides and narrow neck of this flask allow the contents of the flask to be mixed by swirling, without risk of spillage, making them suitable for titrations by placing it under the buret and adding solvent and the indicator in Erlenmeyer flask.
When would you use an Erlenmeyer flask?
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.
What is an Erlenmeyer flask and what is it used for?
Mixing
How do you hold and move a flask if you are mixing chemicals?
How do you hold and move a flask if you are mixing chemicals? You transport them with a forcep.
Why is a volumetric flask shaped that way?
When the glassware was made by hand, the bulb at the bottom varied in size, so each flask had to be filled with the correct volume before the line could be etched on the glass. A tube was used for the neck since the volume filling the tube would change at a consistent rate. The flask looks like a pear shaped container.
What happens if you overfill a volumetric flask?
Overfilling the flask above the graduation mark ruins the volume measurement. In this case, the content inside the volumetric flask should be discarded. A pipette bulb should be used to withdraw and deliver liquids when using a pipette.
What’s the difference between beaker and flask?
The main differing characteristic between a flask and a beaker is that beakers have straight sides, rather than slanted sides like a flask. Beakers are mainly for measuring and transporting liquids from one site to the next.
Why is volumetric pipet more accurate?
volumetric pipet more accurate because its long size decreases error of misreading the meniscus and volumetric pipets are designed to measure specific volumes (such as 5ml). Also graduated cylinders are not calibrated during manufacture process.
Why is a volumetric flask better than a measuring cylinder?
Graduated cylinders are generally more accurate and precise than laboratory flasks and beakers, but they should not be used to perform volumetric analysis; volumetric glassware, such as a volumetric flask or volumetric pipette, should be used, as it is even more accurate and precise.
How accurate is a volumetric pipette?
A volumetric pipette, bulb pipette, or belly pipette allows extremely accurate measurement (to four significant figures) of the volume of a solution. The tolerance depends on the size: a 0.5-mL pipette has a tolerance of ±0.006 mL, while a 50-mL pipette has a tolerance of ±0.05 mL.
Why do we use a volumetric flask Labster?
A volumetric flask is a standard piece of glassware in a chemistry lab. Its main purpose is to be used for creating solutions in with a high accuracy of the concentration. It often comes with a stopper for the top, which can be used to completely seal of the flask in connection with mixing the content.
Why do we use a volumetric flask quizlet?
A volumetric flask is used to measure precise liquids when you make a Molar solution.
What do you do if you add too much solvent when filling the volumetric flask to the mark?
If too much solvent is added, the solution must be discarded and a new solution should be prepared from the first step of the procedure.
What is the primary function of a burette?
Burette, also spelled Buret, laboratory apparatus used in quantitative chemical analysis to measure the volume of a liquid or a gas. It consists of a graduated glass tube with a stopcock (turning plug, or spigot) at one end.
How precise is a burette?
10 mL burettes are usually graduated each 0.05 mL, while 25 mL and 50 mL burettes are usually graduated each 0.1 mL. That means that 50 mL burettes have the highest resolution. 0.050 mL out of 50 mL is 0.1%, and that’s about maximum precision that we can get from volume measurement when using burette.
What is the primary function of a burette quizlet?
A burette is used to deliver a measurable volume of solution, dropwise, into a conicl flask containing another solution.
What is the function of pipette?
A pipette is a laboratory instrument used to measure out or transfer small quantities of liquid, in volumes of milliliters (mL), microliters (μL).
What are the two types of pipettes?
There are 3 types’ air-displacement, positive-displacement and dispenser pipets.
What is the difference between a pipette and a burette?
Burette and pipette are lab equipment used in the volumetric analysis of an analyte. Burette is a glass tube having a tap at the bottom. Pipette is also a glass tube that has a bulge in the middle. They both have gradations to measure the quantity of chemical substances.
What is a pipette and what is it used for?
To transport a measured volume of liquid
What is the most accurate type of pipette?
volumetric pipette
What is a Pasteur pipette used for?
To transfer small quantities of liquids
Why use a pipette instead of a measuring cylinder?
Why use a pipette instead of a measuring cylinder? Unlike a measuring cylinder, a pipette will be more accurate with all of the sample, accounting for every drop of the substance being held within the tool.