ERLENMEYER FLASK An Erlenmeyer Flask is a coneshaped
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ERLENMEYER FLASK An Erlenmeyer Flask is a coneshaped container with neck, so you can hold the flask or attach a clamp or use a stopper. They are used to measure, mix, and store liquids. The shape makes this flask very stable. They are one of the most common and useful pieces of chemistry lab glassware. Most Erlenmeyer flasks are made of borosilicate glass so that they can be heated over a flame or autoclaved. The most common sizes of Erlenmeyer flasks probably are 250 ml and 500 ml. They can be found in 50, 125, 250, 500, 1000 ml. You can seal them with a cork or stopper or place plastic or paraffin film or a watch glass on top of them.
Beaker No lab would be complete without beakers. Beakers are used for routine measuring and mixing in the lab. They are used to measure volumes to within 10% accuracy. Most beakers are made from borosilicate glass, though other materials may be used. The flat bottom and spout allow this piece of glassware to be stable on the lab bench or hot plate, plus it's easy to pour a liquid without making a mess. Beakers are also easy to clean.
Crucible A crucible is a cup-shaped piece of laboratory glassware that is used to hold samples which are to be heated to high temperatures. Many crucibles come with lids.
Funnel A funnel is a conical piece of glassware that terminates in a narrow tube. It is used to transfer substances into containers that have narrow mouths. Funnels may be made of any material. A graduated funnel may be called a conical measure.
Graduated Cylinders Graduated cylinders are used to measure volumes accurately. The can be used to calculate the density of an object if its mass is known. Graduated cylinders usually are made from borosilicate glass, though there are plastic cylinders, too. Common sizes are 10, 25, 50, 100, 250, 500, 1000 ml. Choose a cylinder such that the volume to be measured will be in the upper half of the container. This minimizes measurement error.
Petri Dish Petri dishes come as a set, with a flat bottom dish and a flat lid that rests loosely over the bottom. The contents of the dish are exposed to air and light, but the air is exchanged by diffusion, preventing contamination of the contents by microorganisms. Petri dishes that are intended to be autoclaved are made from a borosilicate glass, such as Pyrex or Kimax. Single-use sterile or non-sterile plastic petri dishes also are available. Petri dishes commonly are used for culturing bacteria in a microbiology lab, containing small living specimens, and holding chemical samples.
Pipettes are used to measure and transfer small volumes. There are many different types of pipettes. Examples of pipette types include disposable, reusable, autoclavable, and manual. They are calibrated to deliver a specific volume. Some pipettes are marked like graduated cylinders. Other pipettes are filled to a line to reliably deliver one volume again and again. Pipettes may be made of glass or plastic.
Test Tube and Rack Test tubes are roundbottom cylinders, usually made of borosilicate glass so that they can withstand temperature changes and resist reaction with chemicals. In some cases, test tubes are made from plastic. Test tubes come in several sizes. The most common size is smaller than the test tube shown in this photo (18 x 150 mm is a standard lab test tube size). Sometimes test tubes are called culture tubes. A culture tube is a test tube without a lip.
Volumetric Flask Volumetric flasks are used to accurately prepare solutions for chemistry. This piece of glassware is characterized by a long neck with a line for measuring a specified volume. Volumetric flasks usually are made of borosilicate glass. They may have flat or round bottoms (usually flat). Typical sizes are 25, 50, 100, 250, 500, 1000 ml.
Watch Glass Watch glasses are concave dishes that have a variety of uses. They can serve as lids for flasks and beakers. Watch glasses are nice for holding small samples for observation under a low-power microscope. Watch glasses are used for evaporating liquid off of samples, such as growing seed crystals. They can be used for making lenses of ice or other liquids. Fill two watch glasses with liquid, freeze the liquid, remove the frozen material, press the flat sides together. . . lens!
Tongs 1 ) Beaker Tongs are best used for holding or moving a hot beaker. The jaws are usually covered with plastic so beakers may be firmly held under the rim while pouring contents. 2) Crucible Tongs pick up crucibles, test tubes, flasks, beakers, etc. They feature rustproof, 1/4″ nickel-plated steel wire with riveted joints and accurately aligned corrugated tips. Long handles give an added measure of safety when reaching into ovens or fume hoods, or when handling hot liquids.
Ring Stand & Supports/Clamps A ring stand will conveniently heat beakers, flasks, test tubes, and other glassware over a burner, or set up physics apparatus such as moveable pulleys and inclined planes. A ring support attaches to the stand to support other equipment. The burette clamp holds burettes and test tubes.
Wire Gauze and Clay Triangle Wire gauze rests on the ring to support glassware above an alcohol burner. The triangle rests on the ring to support funnels, crucibles and evaporating dishes.
Bunsen Burner A Bunsen burner is a common piece of laboratory equipment that produces a single open gas flame, which is used for heating, sterilization, and combustion.
Mortar and Pestle A mortar and pestle is a tool used to crush, grind, and mix substances. The pestle is a heavy stick whose end is used for pounding and grinding, and the mortar is a bowl. The substance is ground between the pestle and the mortar.
Well Plate This is a flat plate with multiple “wells” used as small test tubes. In chemistry used for mixing small amount of reagents for chemical reactions.
Fume Hoods Fume hoods protect laboratory workers from fumes and potentially dangerous chemical reactions by continuously vaccuming air out of the lab and by providing a glass shield. Experiments can be clearly seen by the user, yet the user is protected from splatter and harmful fumes.
Pipettes are devices that allow the users to extract or deliver small amounts of a liquid. Pipettes come in a variety of designs with only two shown. Some are graduated to deliver exact quantities, but most allow for a "drop at a time" delivery.
Resources http: //chemistry. about. com/od/chemistrylabexperiments/ig/Ch emistry-Laboratory-Glassware/Erlenmeyer-Flask. -17 L. htm http: //wardsci. com/