2.3. Standard-Taper Glassware for Microscale Procedures
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An Inexpensive Semiautomatic Pressurized Microfiltration DeviceE. Rodríguez-Fernandez, M. A. Vicente, J. J. Criado, and J. L. Manzano Using the device shown, the filtration of small volumes (= 10 mL) of liquid can be facilitated by replacing the vacuum or manual pressure on the piston with pressure exerted by a rubber band on the piston. The filtration is thus conducted in a semiautomatic way. Rodríguez-Fernandez, E.; Vicente, M. A.; Criado, J. J.; Manzano, J. L. J. Chem. Educ.2008, 85, 1051.
Laboratory Equipment / Apparatus |
Liquids |
Microscale Lab
Thermal Equilibrium in Plastic and Glass Microscale ContainersEstela Curbelo, María F. Cerdá, and Eduardo Méndez Thermal equilibration of solutions occurs more slowly in plastic than glass containers, a factor that should be considered in the design of microscale experiments. Curbelo, Estela; Cerdá, María F.; Méndez, Eduardo. J. Chem. Educ.2007, 84, 1326.
Heat Capacity |
Laboratory Equipment / Apparatus |
Microscale Lab |
Thermodynamics
Laboratory Experiments on the Electrochemical Remediation of the Environment. Part 7: Microscale Production of OzoneJorge G. Ibanez, Rodrigo Mayen-Mondragon, M. T. Moran-Moran, Alejandro Alatorre-Ordaz, Bruce Mattson, and Scot Eskestrand Ozone, a powerful oxidizing and disinfecting agent, is produced electrochemically in the undergraduate laboratory with simple equipment and under very mild conditions. Tests are given to characterize it, to observe its action in simulated environmental applications, and to measure its rate of production. Ibanez, Jorge G.; Mayen-Mondragon, Rodrigo; Moran-Moran, M. T.; Alatorre-Ordaz, Alejandro; Mattson, Bruce; Eskestrand, Scot. J. Chem. Educ.2005, 82, 1546.
Conductivity Meter (ChemPages Lab)John W. Moore, Jerrold J. Jacobsen, Joe L. March Conductivity Meter: this is a resource in the collection "ChemPages Laboratory Resources". A conductivity meter is used to measure the conductivities of electrolytic solutions. Electrodes on the device are dipped into a solution, and the solution's electrical conductivity is registered on the display. Electrical conductivity is defined as the transfer of an electric current through a solid or liquid. In electrolytic solutions, the current is carried by ions, as in solutions of salts, acids or bases. Conductivity is inversely proportional to the resistivity of the solution. The ChemPages Laboratory Resources are a set of web pages that include text, images, video, and self check questions. The topics included are those that are commonly encountered in the first-year chemistry laboratory. They have been put together for use as both a pre-laboratory preparation tool and an in-laboratory reference source.
Laboratory Equipment / Apparatus
Eppendorf Pipet (ChemPages Lab)John W. Moore, Jerrold J. Jacobsen, Joe L. March Eppendorf Pipet or Digital Pipettor: this is a resource in the collection "ChemPages Laboratory Resources". Digital pipettors deliver liquids in volumes from 1 mL to 1µL or less. They are sometimes called "micropipets", "Eppendorf pipets" or simply "Eppendorfs" after one of the more prevalent brands. The ChemPages Laboratory Resources are a set of web pages that include text, images, video, and self check questions. The topics included are those that are commonly encountered in the first-year chemistry laboratory. They have been put together for use as both a pre-laboratory preparation tool and an in-laboratory reference source.
Laboratory Equipment / Apparatus
Flask, Volumetric (ChemPages Lab)John W. Moore, Jerrold J. Jacobsen, Joe L. March Flask, Volumetric: this is a resource in the collection "ChemPages Laboratory Resources". 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. The ChemPages Laboratory Resources are a set of web pages that include text, images, video, and self check questions. The topics included are those that are commonly encountered in the first-year chemistry laboratory. They have been put together for use as both a pre-laboratory preparation tool and an in-laboratory reference source.
