According to GCSE Science, a burette is calibrated to give readings that are accurate to 0.2 cubic centimeters. On the other hand, a pipette has a bulge in the middle, and is calibrated with a filling line that gives a precise volume of the substance it contains at the particular point. A clean volumetric pipette gives a reading to the precision of 0.01 milliliters, according to Green River Community College.Continue Reading
A burette is a long tube made of glass that has a tap at its bottom end, GCSE Science explains. One type of burette is graduated along its length with marks that are 2 cubic centimeters apart. It has additional smaller marks in between that give it its level of accuracy, showing the total volume of a substance at each mark.
As Titrations explains, single volume pipettes belong to a category of volumetric glass that measure predetermined volumes of a solution. When a pipette is emptied, it delivers the exact volume of a solution it is designed to hold. The accuracy of a pipette is not affected by remnants of a substance on its walls and in the tip. The measuring tubes not only exhibit high levels of precision but also allow for repeatability of measurements.Learn more about Chem Lab
In chemistry, scientists commonly use a Fehling's test to reduce sugars. To perform this test, the scientist uses both Fehling's B and Fehling's A solutions. The A solution is dilute sulfuric acid, distilled water and copper sulfate III, and the B solution is distilled water, potassium tartrate and sodium hydroxide.Full Answer >
Media for growing bacteria and cells is sterilized before use to prevent the contamination of the desired culture with other types of bacteria or cells. The presence of undesired cells on culture media can lead to the failure of the culture or affect the results of future experiments.Full Answer >
A confirmatory test is a controlled chemical reaction used to determine the presence of a specific ion or compound in a solution or substance. Confirmatory tests are commonly used after an experiment in a laboratory setting to determine if the reaction proceeded to completion or if the desired products were produced.Full Answer >
Chromium-vanadium steel is an alloy made of iron with carbon, chrome and vanadium added to improve the properties of the metal. These alloys vary by percentage of additives; they commonly are stronger at high temperatures.Full Answer >