Definition beaker7/31/2023 ![]() ![]() Most beakers are accurate to within ~10%. These marks are not intended for obtaining a precise measurement of volume (a graduated cylinder or a volumetric flask would be a more appropriate instrument for such a task), but rather an estimation. For instance, a 250 mL beaker might be marked with lines to indicate 50, 100, 150, 200, and 250 mL of volume. Alternatively, a beaker may be covered with another larger beaker that has been inverted, though a watch glass is preferable.īeakers are often graduated, that is, marked on the side with lines indicating the volume contained. Diameter: These specifications range from as small as 20 mm to as large as 230 mm (outside). Volume: Beakers can range in capacity from as little as 5 ml to as great as 10,000 ml. However, when in use, beakers may be covered by a watch glass to prevent contamination or loss of the contents, but allowing venting via the spout. A flat beaker or crystalizer features a greater surface area for more uniform heating/boiling out of liquids and better extraction of solids. The presence of a spout means that the beaker cannot have a lid. These beakers usually do not have a flat scale. Flat beakers (C) are often called "crystallizers" because most are used to perform crystallization, but they are also often used as a vessel for use in hot-bath heating. These are sometimes called Berzelius beakers, after Jöns Jacob Berzelius, and are mostly used for titration. The rule you are trying to link is already linked elsewhere in the system. The rule you are trying to link has the wrong rule context. The rule you are trying to link has not been tested using the Rule Tester. "Tall-form" (B) beakers have a height about twice their diameter. The rule you are trying to link has incorrect evaluation logic. You may also find beakers made from stainless steel, quartz, and carbon. Although glass beakers are common, beakers are also made from a variety of plastic resins (PMP, polystyrene, polypropylene, PFA, polymethylpentene, HDPE, ETFE, PTFE, and more). Most also have a tiny spout (or beak) to enable pouring, as seen in. Laboratory are available in a range of materials and in sizes from 10 mL to 6 L. Low form beakers are likely to be used in some way when performing a chemical experiment. A beaker is typically a cylindrical container with a flat bottom used in lab equipment. These are the most universal character and are used for various purposes-from preparing solutions and decanting supernatant fluids to holding waste fluids prior to disposal to performing simple reactions. The common low form with a spout was devised by John Joseph Griffin and is therefore sometimes called a Griffin beaker. You may also find beakers made from stainless steel, quartz, and carbon.Standard or "low-form" (A) beakers typically have a height about 1.4 times the diameter. ![]() Laboratory are available in a range of materials and in sizes from 10 mL to 6 L. Glass beakers may have graduated markings on their side that are accurate within 10 percent, though a graduated cylinder or volumetric flask is recommended for precise volume measurements. Glass beakers feature uniform sidewalls and bottom thicknesses with a flat bottom and a beak, or small spout, for easier pouring. Glass beakers can be heated to much higher temperatures than the plastic counterparts, while offering higher clarity for content visibility and measuring. ![]()
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