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A dropping funnel or addition funnel is a type of laboratory glassware used to transfer liquids. They are fitted with a stopcock which allows the flow to be controlled. Dropping funnels are useful for adding reagents slowly, i.e. drop-wise. This is desirable when the quick addition of the reagent results in side reactions, or if the reaction is ...
An eye dropper, also called Pasteur pipette or simply dropper, is a device used to transfer small quantities of liquids. [1] They are used in the laboratory and also to dispense small amounts of liquid medicines. A very common use was to dispense eye drops into the eye.
A pipette (sometimes spelled as pipet) is a type of laboratory tool commonly used in chemistry and biology to transport a measured volume of liquid, often as a media dispenser. Pipettes come in several designs for various purposes with differing levels of accuracy and precision , from single piece glass pipettes to more complex adjustable or ...
There are two main strands of the modern approach. One is based on the idea that many of the experiments associated with general chemistry (acids and bases, oxidation and reduction, electrochemistry, etc.) can be carried out in equipment much simpler (injection bottles, dropper bottles, syringes, wellplates, plastic pipettes) and therefore cheaper than the traditional glassware in a laboratory ...
Rubber bulbs are used in chemistry laboratories, by placing them on top of a glass or plastic tube. It serves as a vacuum source for filling reagents through a pipette or pasteur pipette and also help control the flow of liquid from the dropping bottle. [1] By using rubber bulb, the contact of the mouth to the chemicals can be avoided.
When used with filter paper, filter funnels, Buchner and Hirsch funnels can be used to remove fine particles from a liquid in a process called filtration. For more demanding applications, the filter paper in the latter two may be replaced with a sintered glass frit. Separatory funnels are used in liquid-liquid extractions.
Reverse pipetting is a technique to dispense a measured quantity of liquid by means of air displacement pipette.The technique is mainly recommended for solutions with a high viscosity or a tendency to foam: [1] as it reduces the risk of splashing, foam or bubble formation.
Used for pouring liquids or powder through a small opening and for holding the filter paper in filtration. Used in transferring liquids in small containers. Funnels known as killing cones are used to slaughter individual birds in poultry farming. The funnel is used to hold a bird upside down so that it can be bled more easily. [5]