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A mortar and pestle are used to grind up solid chemicals into a fine powder and crush solids into smaller pieces. ... The pestle is a heavy and blunt club-shaped object, the end of which is used for crushing and grinding. The substance to be ground is placed in the mortar and ground, crushed or mixed using a pestle.

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A microplate typically has 6, 12, 24, 48, 96, 384 or 1536 sample wells arranged in a 2:3 rectangular matrix. ... Each well of a microplate typically holds somewhere between tens of nanolitres to several millilitres of liquid. They can also be used to store dry powder or as racks to support glass tube inserts.

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Crucible is used in the laboratory to contain chemical compounds when heated to extremely high temperatures. Crucibles are available in several sizes and typically come with a correspondingly-sized lid.

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1)This is used to mix substances and not make a mess, it has a small mouth so the liquid doesn't go off the flask.
2)safety precaution is you not want to but reactive substances because they could form a disaster.
3)you should use it for smal reactive chemicals

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An iron ring or ring clamp is an item of laboratory equipment which comprises a conjoined metal ring and radially-extending rod. ... Iron rings are commonly used in chemistry laboratories for supporting apparatus above the work surface, for example: a tapered item such as a filter funnel or separatory funnel.

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Burettes are elongated, graduated, tubular containers with a uniform internal diameter, depending on the volume, in liters. Its main use is between its volumetric use, due to the need to accurately measure volumes of liquids at a certain temperature.

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About Pipettes. A pipette is a laboratory instrument used to measure out or transfer small quantities of liquid, in volumes of milliliters (mL), microliters (μL).

You should make sure they are fully clean so you dont contaminate anything. To clean a pipet you should follow this instructions.

1. Using the appropriate technique for filling the pipet, draw distilled water into the pipet until it almost reaches the bulb. Remove the bulb and allow the water to drain. If the water drains without leaving droplets on the inside of the pipet, repeat this rinse twice more and go on to step two. If droplets cling to the inside of the pipet, clean it with detergent solution or cleaning solution. Rinse many times with tap water, then repeat the distilled water rinses.

The correct use is 1. Get the appropriate amount of the solution you wish to pipet in a small, clean, dry beaker. Never pipet directly out of the stock bottles of solution. This creates a contamination risk.

2. Insert the tip of the pipet into the beaker of solution so that it is about 1/4” from the bottom. Be sure not to press the tip against the bottom of the container.

3. If you are right handed, hold the pipet in your right hand, leaving your index finger free to place over the top of the pipet. With your left hand, squeeze the pipet bulb. Press it firmly over the top of the pipet, but DO NOT INSERT THE PIPET INTO THE BULB!! Release the pressure on the bulb and allow the solution to flow into the pipet until it is above the volume mark. Do not allow the solution to reach the bulb.

4. Quickly remove the bulb and place your index finger firmly over the top of the pipet. Slowly roll you finger to one side and allow the liquid to drain until the bottom of the meniscus is aligned with the volume mark. With practice you will be able to lower the liquid very, very slowly.

5. When the bottom of the meniscus is even with the volume mark, press your index finger firmly on the top of the pipet so no liquid leaks out. Pull the pipet out of the solution and touch the tip once to the side of the container.

6. To transfer the solution, place the tip of the pipet against the wall of the receiving container at an angle of 10-20 degrees. Slowly allow the liquid to drain from the pipet. Keep the flow slow so that no droplets cling to the inside of the pipet.

7. When the solution stops flowing, touch the pipet once to the side of the receiving container to remove any hanging drops. DO NOT blow out the remaining solution. The pipet has been calibrated to deliver the appropriate amount of solution with some remaining in the tip.

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2) A ring stand is an item of laboratory equipment consisting of a metal pole with a solid, firm base, used to hold or clamp laboratory glassware and other equipment in place, so that it does not fall down or come apart.

3) Heat flasks or beakers on a ring stand with a wire gauze between the glass and the flame. Store hot liquids only in heat-resistant glassware. Turn off gas valves when not in use.

4) Ring stands are used to hold glassware in place during an experimental procedure. You can attach ring clamps, versatile clamps, or 3-prong clamps (the latter require clamp holders).

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Rubber stoppers are ideal for plugging joints or holes in laboratory glassware and creating a liquid-tight seal. Rubber bungs are often used with glass containers such as test tubes, flasks, jugs, and many other pieces of standard lab equipment.

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2) Evaporating dishes (or crystallizing dishes) are shallow bowls with a flat bottom and pour spout that may be used as reaction vessels, or for the separation of the solute from a solution through crystallization.

3) Evaporating dishes and crucibles can be heated to very high temperatures. They will crack and shatter if placed hot on the lab bench or come into contact with water. Therefore, they should be placed on wire gauze to cool. Do not place hot evaporating dishes or crucibles on your lab manual.

4) The evaporating dish should be allowed to air cool completely before handling. Porcelain evaporating dishes are slightly porous. After washing they should be gently heated to dryness (10-20 seconds over a Bunsen burner) if their weight needs to be recorded as data.

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A micropipette is a common yet an essential laboratory instrument used to accurately and precisely transfer volumes of liquid in the microliter range

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What is: A thermometer is a tool that measures temperature — how hot or cold something is. ... Made up of thermo (heat) and meter (measuring device), the meaning of the word thermometer is pretty straightforward. Thermometers measure temperatures in degrees, according to either the Celsius or Fahrenheit system.

Safety precautions: Answer: The thermometer should be kept upright not tilted. Bulb should be surrounded from all the sides of the substance whose temperature has to be taken. The bulb should not touch the container if the substance to be measured is in liquid form.

How to use it:

1. Clean the tip with cold water and soap, then rinse it.

2. Turn the thermometer on.

3. Put the tip under your tongue, towards the back of your mouth.

4. Close your lips around the thermometer.

5. Wait until it beeps or flashes.

6. Check the temperature on the display.

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Protective glasses, goggles or goggles are a type of protective glasses that are normally used to prevent the entry of materials, such as wood, pieces of metal, water or chemicals in the eyes.
How to use this item is simple: just put it on your head and arround the eyes( it dosent work if it is in your head and not on your eyes.

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2) A gas cylinder is a pressure vessel for storage and containment of gases at above atmospheric pressure. ... Inside the cylinder the stored contents may be in a state of compressed gas, vapor over liquid, supercritical fluid, or dissolved in a substrate material, depending on the physical characteristics of the contents.
3)It is a gas cylinder which is a  pressure vessel for storage and containment of gases at above atmospheric pressure.
4)Close the cylinder valve before removing the gas discharge equipment.
Clearly mark or label the cylinder "empty" or "MT."
Place the cylinder in a storage area separate from that used for full cylinders.
Keep incompatible materials away from the cylinder.

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1. Utility clamps support your flasks, beakers, and burettes. They stabilize your sample containers, preventing possible breakage and sample loss.

2. General-purpose clamps are used for securing glassware - therefore make sure that the inner surfaces of the clamp 'jaws' and the 'fingers' are covered with cork or rubber to provide a cushion for the glass: there must be no metal to glass contact in case you overtighten the clamp and crush the glass. Tighten the clamp firmly and ensure that the clamped glassware does not move.

3. The correct way to use it is to pick it in you hand and gently put the beaker, conical flask or burettes in the fingers of the utility clamps, make sure the clamps are tighten to the glassware so it would not fall.

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In laboratories, spatulas and microspatulas are small stainless steel utensils, used for scraping, transferring, or applying powders and paste-like chemicals or treatments. Many spatula brands are also resistant to acids, bases, heat, and solvents, which make them ideal for use with a wide range of compounds.

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What is: A wash bottle is a squeeze bottle with a nozzle, used to rinse various pieces of laboratory glassware, such as test tubes and round bottom flasks

Safety precautions of Wash Bottle: Rinse thoroughly with distilled water. To avoid scratching the plastic or the printing, do not use abrasive cleaners or scouring pads. Do not autoclave these bottles. NOTICE: Periodically inspect the wash bottles for signs of stress such as cracking, crazing, or whitening of the plastic.

How to use it: In the lab, wash-bottles are used to supply precise and small quantities of various liquids. ... The VENT-CAP (patent pending) virtually prevents leaking, dripping or escaping of liquid from the dispensing tube, which can occur because of temperature changes in the laboratory.

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1) A Watch Glass, is a circular piece of glass, used as a surface to evaporate liquids or chemicals and for holding some substances.

2) A safety precaution while using a Watch Glass, would be to always use gloves to prevent chemicals to fall on your skin.

3) The correct way to use it, is by carrying it with one hand under the glass for support.

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1) A Test Tube, is a thin glass cylinder used for holding small quantities of liquids or chemicals during a experiment.

2) A safety precaution while using a Test Tube, is to always point it away from other people and making sure to wear some safety goggles while using it.

3) The correct way to use a Test Tube, is by carrying it with a test tube holder and alway placing it in the Test Tube Rack.

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Electronic balances have become standard equipment for many high school and college chemistry departments. They allow the user to quickly and accurately measure the mass of a substance to a level of accuracy impossible for traditional balances to achieve

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1) A bunsen Burner is a prototype used to heat, burn, sterilize or melt chemicals or ingredients that are used in the lab.

2) 1 recommended safety precaution would be to remove all papers, notebooks, combustible materials and excess chemicals from the area.

3) The correct way to use it if you want to move it to another place of the table, is by holding it by the base. You shouldn't touch it any higher than the COLLAR.

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The funnel is a tool that people use to transfer liquids into small mouth beakers, they use it to to only tranfer liquid and not slids, because the solids get traped in the funnel. A safety precatun at using the funnel is, you need to stay holding it because if you pour your liquid int it without holding it, you could accidently move the funnel and make solids drop to the floor. The correct way of uisng it is grabing it by the part of above and try to not move it.

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File, in hardware and metalworking, tool of hardened steel in the form of a bar or rod with many small cutting edges raised on its longitudinal surfaces; it is used for smoothing or forming objects, especially of metal.

1. Do not use a file as a pry bar, hammer, screwdriver or chisel.

2. When using a file or a rasp, grasp the handle in one hand and the toe of the file in the other.

3. Do not hammer on a file

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Beakers are useful as a reaction container or to hold liquid or solid samples. They are also used to catch liquids from titrations and filtrates from filtering operations.

For large beakers, use two hands, one on the side and one supporting the bottom. Never carry bottles by their necks. Use a cart to transport large bottles of dense liquid. Do not pick up broken glass with bare or unprotected hands.

The correct way for using a beaker is using safety tongs when handling a hot beaker. Pour liquid out of the beaker by using the spout in the lip around the top of the beaker.

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2. A graduated cylinder is used for measuring the volumes of liquids or chemicals.

3. Graduated cylinders are not intended for mixing, stirring, heating, or weighing so you should only use it for measuring the chemicals.

4. The correct way to use the graduated cylinder is to put it on the table and drop liquids inside of it with the beaker, conical flask, etc.

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Brushes are designed for the purpose of cleaning test tubes, therefore are developed to be able to reach all corners of the glassware.

One safety precaution is to after using them clean them really well so the chemicals you have been using don't stay there.

The correct way to use it is grabbing them from the metal part and put it in the the test tubes.

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What is: An eye dropper, also known as a Pasteur pipette, or dropper, is a device used to transfer small quantities of liquids. They are used in the laboratory and also to dispense small amounts of liquid medicines. ... The combination of the pipette and rubber bulb has also been referred to as a teat pipette

Safety precautions: be sure that the dropper never touches your container or the contents in it. Never put it down on the bench top, but return it immediately the right reagent bottle.

How to use it: When you squeeze the rubber top on thedropper you squeeze the air out. Then when you put the tip into the liquid and stop squeezing the top, the low pressure inside sucks up the liquid. In fact it is the higher pressure outside the dropper, in the liquid, that pushes the liquid up into the dropper

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A stopwatch is a timepiece designed to measure the amount of time that elapses between its activation and deactivation. A large digital version of a stopwatch designed for viewing at a distance, as in a sports stadium, is called a stop clock.

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Tongs:The tongs are used for not touching hot beakers or hot crucibles, they are like a type of scicsorzs that can grab easier hot beakers and you don't get burned, you need to be carfull because if you relax your hand you could drop the beaker or crucible.THe correct way of using one is grabing it by the 2 ears it has with the fingers and put a little bit of force so it doesn't fall out the thing you are grabing

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2. The wire gauze is used as a support for different containers when they are placed across a support ring above the bunsen burner to spread the heat.

3.  Be sure to fold the ends of the gauze under for maximum heat diffusion. Also, for the gauze to work the best, a person should use a glassware item with a flat bottom so the heat spreads better and heats the chemical.

4. The correct way to use the wire gauze is to place it above the tripod and put the container with the chemical wanted to be heated above the wire gauze.

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Forceps are the "tweezers" in an organic chem lab. They come in many sizes and shapes, sometimes old and discolored, sometimes new and shiny, sometimes sharp and pointed, sometimes flat-ended. Is used to pick up tiny things.

One saftey precaution is to never use them near your face, the tip is kinda sharp so you should protect your eyes from it.

The correct way for using it is when you need to pick up something that is to small for picking it up with your hands. For example hair, earings, etc.

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A test-tube rack is a tool that is part of the laboratory material, used to hold multiple test tubes upright at the same time. 1 safety precaution while using a test-tube rack is to first clean it. Then rinse the glassware with tap water. Allow the water to run into and over the glassware and then fill each piece with water. Fill the test tubes, flasks, and other glassware with water and shake to empty them. These racks are especially useful for organizing test tubes when different solutions are being worked on or collected at once.