What is a flat bottom flask used for?
What is a flat bottom flask used for?
Heating or boiling of liquid, Distillation
What is the difference between round bottom flask and flat bottom flask?
Difference between round bottom flask and flat bottom flask is that round bottom flask has spherical in shape whereas flat bottom flask has flat under the flask. Round bottom flask cannot stand whereas flat bottom flask can stand itself.
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.
What is flask used for?
Flask is an API of Python that allows us to build up web-applications. It was developed by Armin Ronacher. Flask’s framework is more explicit than Django’s framework and is also easier to learn because it has less base code to implement a simple web-Application.
What is Erlenmeyer flask and its uses?
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.
What is a Erlenmeyer flask used to measure?
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.
Why use an Erlenmeyer flask instead of a beaker?
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.
What is the difference between a beaker and flask?
Flasks are notable for their unique shape: a rounded vessel and a cylindrical neck. 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 an Erlenmeyer flask not accurate?
Graduated cylinders, beakers and Erlenmeyer flasks have less accuracy than volumetric glassware. 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.
Why conical flask is better than a beaker?
Once the solution is in the pipette, it’s then transferred to a conical flask. Conical flasks are better than beakers for this procedure because they can be easily swirled without risk of the contents spilling. The scale on its side allows the amount of solution that’s been allowed to flow out to be read off.
Why titration flask should not be rinsed?
Why a titration flask should not be rinsed ? Answer. This is because during rinsing-some liquid will remain sticking to the titration flask therefore the pipetted volume taken in the titration flask will increase.
What are the uses of conical flask?
Why is the volumetric flask accurate?
The first method provided a less precise ranking of glassware since the volume of water had to be estimated for every piece of glassware but the volumetric flask. The second method was more precise because volume was calculated using density, the temperature of water, and a digital balance.
What is volumetric flask used for?
A volumetric flask is used when it is necessary to know both precisely and accurately the volume of the solution that is being prepared. Like volumetric pipets, volumetric flasks come in different sizes, depending on the volume of the solution being prepared.
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 need to calibrate volumetric flask?
Calibration of Volumetric Flask Unlike other glassware equipment on the list, a volumetric flask is used for mixing or preparing a certain amount of any solution. It is crucial to clean this apparatus properly so that appropriate quantities can be measured, and no contamination happens with the liquid.
What is the main limitation of using volumetric flask?
The volumetric flasks are small in size,so measuring a large volume by a volumetric flask is fairly difficult. Either a very big flask is needed or we have to measure the large volume into smaller parts. Most of the volumetric flasks have only one specific marking for measuring a specific volume.
What is the importance of calibration?
The goal of calibration is to minimise any measurement uncertainty by ensuring the accuracy of test equipment. Calibration quantifies and controls errors or uncertainties within measurement processes to an acceptable level. All of which result in damage to the reputation of a business.
Why do Volumetric Flasks not need to be dry?
As you are using the same solution, the moisture left forms part of the measurement. If you rinse a volumetric flask with the solvent you will be measuring, it will not matter if the flask is damp. Volumetric flasks are used to hold exact quantities of solvents or chemicals.
How do you prepare a volumetric flask before using it to make up a standard solution do you have to make sure the flask is dry?
Clean a volumetric flask before use. Rinse the flask several times with the solvent that will be used to prepare the solution. Inspect the flask to ensure that it is clean. Grease or other contaminants may cause the water to bead on the inside surface of the flask.
Do conical flasks have to be dry?
If you are putting the ascorbic acid solution into a conical flask to do an experiment with it, then it definitely needs to be dry, since the water in the flask will change the volume slightly, and this will change the concentration.
Why can a volumetric flask be wet?
The conical flask can be wet with distilled water or dry because the moles of the chemical inside the flask is unaffected by the presence of distilled water.
Which is the best procedure for rinsing the flask?
Which is the best procedure for rinsing the flask? A. Rinse with distilled water and then with the alkali.
What should you do if you fill the flask with water past the mark?
Once liquid is filled to the mark, cap the flask with a stopper and mix as before. Overfilling the flask above the graduation mark ruins the volume measurement. In this case, the content inside the volumetric flask should be discarded.
What should you rinse the volumetric flask with?
Wash the flask and rinse it with solvent (probably distilled water) before using the pipette to add another aliquot of solution to the flask, and another drop of indicator if required. You may also need to refill the burette (buret) to the 0.00 mL mark if you have used more than half the volume of the burette (buret).
Why is the first titration not used?
Titrations are carried out quickly the first time to get a rough idea of the approximate volume that is needed to reach the end point. This value is too big since it is unlikely to have been stopped exactly at the endpoint. This reading is the “rough titre” and is not used to calculate the average.
Why do we rinse burette with solution?
Due to the fact, that all burettes are made of glass, it can absorb and remain water on the surface, because of the polarity of the glass and intermolecular forces. Thus, you have to rinse the burette with a solution which must be filled in it, because distilled water change the concentration of the initial solution.
Is titration proven?
Currently, only 40% of labs utilize automated titration. Though automation has been proven time and time again to be the superior method, it may be hard to convince other people in your business to see the benefits.