What makes a volumetric flask special?

What makes a volumetric flask special?

Volumetric flasks are used for precise dilutions and preparation of standard solutions. These flasks are usually pear-shaped, with a flat bottom, and made of glass or plastic. The flask’s label also indicates the nominal volume, tolerance, precision class, relevant manufacturing standard and the manufacturer’s logo.

What is the description of volumetric flask?

A volumetric flask is used to measure very precisely one specific volume of liquid (100 mL, 250 mL, etc., depending on which flask you use). This flask is used to accurately prepare a solution of known concentration.

What is the function of a volumetric flask?

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.

What characterizes a volumetric pipette?

Volumetric Pipettes are designed to very accurately transfer a specific amount of solution. These pipets can only be used to deliver the volume of liquid for which it is calibrated. Volumetric pipets have narrow tips and a bulb-like expansion in the middle.

What is a Class A volumetric flask?

Volumetric Glassware Laboratory glassware can be manufactured from Borosilicate and Soda-lime glass. Class A Borosilicate volumetric glassware has superior thermal and chemical resistance and is better suited to glassware for storage of solutions, e.g. flasks.

Why do we use a volumetric flask quizlet?

A volumetric flask is used to measure precise liquids when you make a Molar solution.

Is a volumetric flask accurate?

The volumetric flask had the lowest percent error (0.3%), so it is the most accurate. The graduated cylinder and beaker were similar in percent error (2.2% and 3.5% respectively).

How does a volumetric pipette work?

A volumetric (Transfer) pipet delivers its marked capacity in one delivery (capacity is printed on the bulb). These pipets are filled to a level above the capacity mark and then water is released until the meniscus is aligned with the zero graduation. The pipet is then completely emptied into the receiving vessel.

Can volumetric flask be heated?

Do not heat volumetric glassware (it will break if you do). Usually you can get around the problem of wet volumetric glassware by rinsing it with 4 or 5 small aliquots of the solution to be measured so the solution replaces the water. Beakers are roughly graduated and may be used for estimating the volume of a liquid.

How is a volumetric flask used to prepare a solution with a known concentration?

Fill the volumetric flask about halfway with distilled water or deionized water (aqueous solutions) or other solvent. Transfer the solid to the volumetric flask. Rinse the weighing dish with the water to make certain all of the solute is tranferred into the flask. Stir the solution until the solute is dissolved.

What is a volumetric flask and how is it used?

A volumetric flask is a piece of laboratory glassware that is used to prepare and measure chemical solutions . It is used to make up a solution to a known volume. Volumetric flasks measure volumes much more precisely than beakers and Erlenmeyer flasks. A volumetric flask is characterized by a bulb and a long neck.

Which glassware is most accurate?

Volumetric pipets, flasks and burets are the most accurate; the glassware makers calibrate these to a high level of accuracy. The accuracy is usually measured in terms of the tolerance, which is the uncertainty in a measurement made with the glassware.

What is a graduated flask?

A volumetric flask (measuring flask or graduated flask) is a piece of laboratory apparatus, a type of laboratory flask, calibrated to contain a precise volume at a certain temperature.