What is the function of stirring rods?
What is the function of stirring rods?
A stirring rod is used for mixing liquids, or solids and liquids. Stir rods are used as part of proper laboratory technique when decanting supernatants because the contact helps to negate the adhesion between the side of the glassware and the supernatant that is responsible for the liquid running down the side.
How do magnetic stir bars work?
How does it work? A stir bar magnet is placed inside a container, immersed in the fluid. A separate magnet (or magnets) is placed underneath the container, so that it attracts to the stir bar magnet. If the magnets are close enough, the stir bar magnet spins inside the container.
Why can one not use a Teflon coated stir bar?
Stir bars are typically coated with polytetrafluoroethylene (PTFE), a durable and inert polymer. But they can quickly become discolored, especially when exposed to catalytic metals such as palladium. The researchers also found that these metals could leach into solution and interfere with reactions.
What is a ring stand used for?
Definition of ring stand : a metal stand consisting of a long upright rod attached to a heavy rectangular base that is used with rings and clamps for supporting laboratory apparatus.
Can magnetic stirrers be heated?
Depending on the application, you can configure your magnetic stirrer with hot plates to heat your samples as they’re stirred. With the use of heating plates, you can mix a wide variety of samples for different applications.
Why is the iron stirrer covered in plastic?
Mr. Rosinger’s patent includes a description of a coated bar magnet placed in a vessel, which is driven by a rotating magnet in a base below the vessel. Mr. Rosinger also explains in his patent that coating the magnet in plastic or covering it with glass or porcelain makes it chemically inert.
What is glassware apparatus?
Glassware used as laboratory apparatus offers a wide range of containment and transport functions for solutions and other liquids used in laboratories. All laboratory glassware should be cleaned immediately following use to prevent chemical residue from congealing or hardening.
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.
