These are available in different sizes i. Just Remember: The temperature affects the volume; therefore always avoid using liquids that will vary in temperature for example hot water that will cool. Burets are often used for the addition of a precise and accurate volume of liquids. These are normally attached to a ring stand with a clamp. A buret is also like a glass tube that is open from the top and becomes a narrow pointed opening at the bottom side.
Right above the bottom opening; there is a stopcock. This stopcock can be turned to control the released amount of liquid. There are also certain markings along the length of the buret that indicates the volume of any liquid present in them. A buret is especially used for the extremely accurate addition of liquids. By slightly adjusting the stopcock, the amount of releasing liquid can be slowed down to a single drop every few seconds.
Buret is one of the most accurate tools in the laboratory. To determine the added amount of liquid in solution, write down the readings, how much is present initially in the buret. Then when you were finished adding liquids, write down how much liquid is left. Now, Subtract the final amount of liquid from the initial amount and you have the exact volume of liquid that is added. Forcep is derived from the Latin word forcipes used for holding and grasping small objects in laboratories.
There is a large variety of pipettes that are designed to accomplish many specific goals. However, they all are for measuring the exact volume of liquids and then placing liquids into the other containers. Generally available sizes are 10cm3, 20cm3 and 25cm3. The temperature of a substance is measured using a thermometer. A watch glass circular convex or concave rounded piece of the glass often used to hold a small amount of solid or liquid, to evaporate a liquid, while being weighed, and for many other purposes.
Watch Glasses are also used for different purposes like evaporation. Most glass type is reused and plastic-type are disposable i. Nowadays polythene wash bottles are used in the laboratory for storing distilled water for various operations such as transferring precipitates from a container to the filter paper or washing the precipitates.
When the bottle is pressed with hand, water comes out through the jet in the form of a fine stream. It is also known as a boiling flask. Florence flask contained a round bottom with a long neck. It is used for holding liquids and can easily be heated and swirled. It can also be capped by glass or rubber stoppers easily. Once again, safety edict that this flask never is heated when covered or capped with a stopper. It build-up pressure and can result in an explosion.
Utility Clamp resembles a couple of scissors often used to secure glassware to a ring stand. Ring Stand is helpful as a laboratory apparatus for holding or clamping different lab glassware so that it does not fall down. It is made of wood, polythene, or steel on which test tubes can be placed in an upright position. Test Tubes are normally held in a test tube rack. Test Tube Racks are specifically designed for this purpose.
If these test tubes become risky to touch with bare hands in a case due to heat or some other reason ; test-tube tongs are used to move them. On a recent trip to the laboratory, I was able to see and learn about an incredible invention: the test tube clamp. This product is so cool because it can be used as a stand to hold up your test tubes without spilling any liquid.
The clamp also has two clamps that can be used as handles for carrying around multiple test tubes at once. The best part of this invention is that it saves both time and space in labs because scientists no longer need as many lab hands or other furniture such as stands. Clay Triangles are placed on a ring that is attached to a stand that provides support to funnel, evaporating dish or crucible, etc. The crucible is an instrument used in chemistry laboratories for heating substances until they melt or vaporize.
Analytical Balance Make sure balance is zeroed reads zero before beginning. Never place chemicals directly onto the balance pan. Use a weigh paper or dish. Crucible and cover Crucibles are used for heating certain solids, particularly metals, to very high temperatures. The cover can be used to contain any smoke particles. Crucible Tongs For handling hot crucibles; also used to pick up other hot objects - NOT to be used for picking up beakers!
Erlenmeyer Flask Erlenmeyer flasks hold solids or liquids that may release gases during a reaction or that are likely to splatter if stirred or heated. Note the size 9. Evaporating Dish The evaporating dish is used for heating stable solid compounds and elements, as well as for evaporating nonvolatile solutions. Florence Flask Rarely used in first year chemistry, it is used for the mixing of chemicals.
Narrow neck prevents splash exposure. Forceps Forceps are used to hold or pick up small objects. Funnel A funnel is used to aid in the transfer of liquids from one vessel to another, and will hold filter paper while filtering.
It may be glass or plastic. Graduated Cylinder A graduated cylinder is used to more accurately measure volumes of liquids probably your best everyday measuring tool there are three sizes in your desk: 10 mL, 50 mL and mL. Buret A buret is used to very accurately measure volumes of liquids and dispense small measurable amounts of liquids. Pipet A pipet is used to very accurately dispense volumes of liquids. We use a pipet bulb or a delivery tube to dispense the liquid.
Never use your mouth to draw liquid into the pipet. Glass Dropper Pipet A droper pipet is used to transfer a small volume of liquid, usually one drop at a time. Disposable Pipet Pipe Stem Clay Triangle The pipe stem triangle is used as a support for crucibles when being heated over a lab burner. It can also be used to support a funnel when filtering. Reaction Plates Reaction plates or multi-well plates are used when we want to perform many small scale reactions at one time.
It is like having lots of test tubes available at one time. Ringstands and their Components Ringstands are a safe and convenient way to perform reactions that require heating using a lab burner. Never put them in the cabinet if they are too hot to hold as it can cause a fire. Ringstands and their Components Metal Ring Metal rings connect to a ringstand, and provide a stable, elevated platform for a beaker to be heated.
Will also hold a pipe stem triangle and funnel during filtering Image source xump. Ringstands and their Components Wire Gauze Wire gauze sits on the iron ring to provide a place to stand a beaker. On older wire gauze, the white material was asbestos — currently it is a ceramic. Never insert a spatula directly into a reagent bottle. Chemicals should never be transferred with your bare hands.
Stirring Rod The stirring rod is used to: a manually stir solutions; b assist in pouring liquids; and c to transfer a single drop of a solution. Rubber policeman tip is used to remove precipitates. In most labs, you'll encounter the same basic apparatus. Here, you will find a picture and an explanation for how to use each piece of equipment. You will learn about:. The first and foremost rule of any laboratory is to be safe!
This may seem obvious, but people often disregard safety protocols for one reason or another, putting themselves and those around them in danger. The best thing you can do is to make sure you follow all safety protocols at all times.
Safety goggles are required wear in all chemistry labs. Not wearing them puts you in danger of eye irritation and possibly blindness in the case of an accident. A small droplet of acid could splash out of the container at any time. Better safe than permanently blinded! Latex gloves should be used when there is a possibility of corrosive chemicals spilling onto your hands. A beaker is a common container in most labs. It is used for mixing, stirring, and heating chemicals. Most beakers have spouts on their rims to aid in pouring.
They also commonly have lips around their rims and markings to measure the volume they contain, although they are not a precise way to measure liquids. Beakers come in a wide range of sizes. Because of the lip that runs around the rim, a lid for a beaker does not exist. However, a watch glass discussed below can be used to cover the opening to prevent contamination or splashing.
Also known as a conical flask, the Erlenmeyer flask was named after its inventor in It has a narrow neck and expands toward its base. This allows easy mixing and swirling of the flask without too much risk of spilling.
The narrow opening also allows for the use of a rubber or glass stopper. It can easily be clamped to a ring stand discussed below as well as heated or shaken mechanically. An important safety tip here is to never heat this flask while it is capped. This could cause a pressure build-up that could result in explosion. Also known as a boiling flask, the Florence flask has a round bottom and a long neck. It is used to hold liquids and can be easily swirled and heated.
It can also easily be capped by rubber or glass stoppers. Once again, safety dictates that this flask never be heated when capped. Pressure build-up and explosions can and do occur. A test tube is a glass tube with one end open and the other end closed. The closed end is rounded. Test tubes are used to hold small samples.
They are primarily used for qualitative assessment and comparison. A common place to see these is the biochemistry lab. When a large number of samples need to be tested and compared, test tubes are used to make this easier. They are also easily capped with a rubber or glass stopper. They are generally held in a test tube rack specifically designed for the purpose.
If the test tubes become unsafe to touch with bare hands whether due to heat or another reason , test-tube tongs can be used to move them. It can hold a small amount of liquid or solid. They can be used for evaporation purposes and also can function as a lid for a beaker.
A crucible is a small clay cup made of a material that can withstand extreme temperatures. They are used for heating substances and come with lids. A lab funnel is just like any other funnel except that it was designed to be used in a laboratory setting.
They can be made of plastic or glass and can have either a short stem or a long stem, depending on what they are needed for.
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