What determines which glassware you measure with?
All volumetric glassware is calibrated with markings used to determine a specific volume of liquid to varying degrees of accuracy. To read this volume exactly, the bottom of the curved surface of the liquid, the meniscus, should be located at the scribed line for the desired volume.
Do all glassware measure with the same degree of accuracy?
Answer Expert Verified They do not. That is because they are used for various things and that is why some glassware is designed to have more accuracy than others that are designed to simply be used for qualitative measuring.
What is the difference between Class A and Class B glassware?
Glassware designated Class A signifies a compliance with applicable construction and accuracy requirements. Class A instruments are the preferred choice for volumetric determinations. Class A flasks are ISO9000 compatible. Class B flasks are general purpose instruments with the same basic design as Class A.
Why use a flask over a beaker?
Flasks are notable for their unique shape: a rounded vessel and a cylindrical neck. Flasks can be used for holding and measuring solutions, as well as for chemical reactions and phase changes (heating, cooling, etc). Beakers, on the other hand, are cylindrical containers with a flat bottom and a spout on top.
What is the purpose of an Erlenmeyer flask?
Erlenmeyer Flask Used to hold and mix chemicals. The small neck is to facilitate mixing without spilling.
What is the difference between a beaker a flask and a graduated cylinder?
Both graduated cylinders and beakers are pieces of laboratory glassware that have a specific function. Graduated cylinders typically are more accurate at reading the volumes of the liquid inside. Beakers are better for stirring and mixing liquids.
Why is beaker least accurate?
The volume marks on a beaker are only approximate values, and therefore only provide whole numbers. For example, a 100 mL beaker might only have marks for every 20 mL, so it would be tricky to gauge the exact volume of a liquid sample falling between the 60 mL and 80 mL marks.
What is a skinny beaker called?
Graduated cylinder ” A tall skinny cylinder used to measure volumes. It is generally a more accurate way to measure volume than a typical beaker or flask.
What is a beaker look like?
In laboratory equipment, a beaker is generally a cylindrical container with a flat bottom. Most also have a small spout (or “beak”) to aid pouring, as shown in the picture. Beakers are available in a wide range of sizes, from one milliliter up to several liters.
Why is it called a beaker?
Tell-tale signs of the beaker, of course, are the cylindrical glass, usually made of borosilicate, the flat bottom, the lip or beaded rim and the small spout, in the form of a beak. But interestingly enough, the beaker was likely named after the Beaker people who were master pottery makers during the Neolithic period.
What holds a burette onto a ring stand?
Used in titrations to measure precisely how much liquid has been delivered. burette clamp. Used to hold burettes on a ring stand. clay triangle.
Which piece of glassware should never be used for measuring the volume of a liquid but can be used for heating and making solutions?
Beaker
What is the difference between tongs and test tube clamps?
Tongs. Tongs are tools that are used for picking up other equipment that may be hot or have a chemical in it that may harm the skin. Beaker tongs are used for carrying beakers, evaporating dishes or flasks. Test tube holders are used for lifting, carrying or heating test tubes.
What is the purpose 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.
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