It helps in scientific experiments, at schools and home. Beakers When you need to measure liquid to perform an experiment or chemical reaction, you can use special containers called beakers. They are wider and bigger than regular test tubes, and they have a flat bottom. Used to hold, mix, and heat liquids.
A magnifying glass Microscopes can often be replaced with a magnifying glass. Such common laboratory apparatus are popular in many homes. The glass can be used for reading directions written in tiny letters, viewing the smallest objects, etc. A dropper When you look at a dropper, you understand that each drop matters.
This particular tool helps to add liquids or other solutions drop-wise, leaving no room for mistakes. Pipette This small glassware with a rubber end is used in medicine and laboratories. It measures a liquid substance and allows one to transfer liquids from bottles with small necks into a new container. Used to draw liquids into a pipe. Thermometer This common laboratory equipment is well-known in each household.
However, thermometers that are used for conducting tests and experiments are not home-like pieces even though they are also used to measure temperature. Stirring rod Liquids are often mixed in chemistry, but you cannot stir them with your finger. Special stirring rods can help with mixing several liquids or heating them in the classroom or a workroom.
Spring scales It is another laboratory apparatus used to measure the mass of objects. Unlike beam balances, spring scales do not measure the material against another mass. Instead, it measures the distance when the material gets displaced due to its weight. A watch glass These pieces of laboratory equipment are used for chemical tests and in medical organisations. A watch glass is a square or circular surface that can hold samples of substance required for tests, weighing, heating, etc.
A wire gauze Made of thin metal and looking like a mesh, this equipment is designed to help to heat glassware that cannot be directly heated by the burner or flame. It protects the glass tubes from being shocked by the fire and broken into pieces. A tripod Humans cannot carry the heated wire gauzes in hands. Thus, they need a piece of additional equipment that can perform this task. A tripod is a stand with three legs that can support the heating wire gauze during experiments. Brushes for test tubes Every test tube needs to be cleaned after holding chemicals and substances.
Test tube brushes are additional laboratory equipment that resolve cleaning problems. 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. Stir with this end. The flints on strikers are expensive. Do not operate the striker repeatedly just to see the sparks! Test tubes are used to mix chemicals, and also to heat chemicals. Only heat test tubes that are Pyrex or Kimax. Rubber Stoppers Rubber stoppers are used to seal a reaction vessel, which could be a flask or a test tube. Stoppers can also be used to force gaseous products of a reaction to flow into a specific location.
There are several markings up and down the length of the container with specific increments. Graduated cylinders come in many sizes. The smaller they are in diameter, the more specific the volume measurements will be. When reading the volume from a graduated cylinder, you will notice that the liquid seems to have an indentation.
The liquid around the edges will be higher than the liquid in the center, sloping down like the sides of a trampoline when someone is standing in the middle. This is called the meniscus. Line the lowest point of the meniscus up with the nearest marking, keeping the cylinder level to properly read the volume. A volumetric flask is a round flask with a long neck and flat bottom. It is used to measure an exact volume of liquid.
There is a small line on the neck that indicates how far to fill the bottle use the bottom of the meniscus. They come with special caps that will not let anything in or out. Remember that temperature affects volume; therefore avoid using liquids that will fluctuate in temperature hot water that will cool, for example.
These are small glass tubes with narrow tips on one end and a rubber bulb on the other. They suck up liquid that can then be squeezed out in small drops. These can be used to add an indicator to a solution about to be titrated. There are a large variety of pipettes designed to accomplish specific goals. However, they are all for measuring an exact volume of liquid and placing it into another container. A buret. These are usually attached with a clamp to a ring stand, as shown in the picture below.
A buret is a glass tube that is open at the top and comes to a narrow pointed opening at the bottom. Right above the bottom opening is a stopcock that can be turned to control the amount of liquid being released.
There are markings along the length of the tube that indicate the volume of liquid present. A buret is used for extremely accurate addition of liquid. By adjusting the stopcock, the amount of liquid that is released can be slowed to a drop every few seconds. Burets are one of the most accurate tools in the lab. To determine how much liquid is added, write down how much is initially in the buret. Then when you're finished adding, write down how much is left.
Subtract the final amount from the initial amount and you have the volume of liquid added. The ring stand is used to suspend burets, beakers, flasks, crucibles, etc. Always make sure everything is clamped to the stand tightly. When clamping glass, be careful not to shatter the glass.
Only tighten until snug. When using a ring on the stand, there are usually other pieces necessary to accomplish the goal. Wire mesh is laid across the ring to distribute evenly heat and support the beaker. A clay triangle with an open center is used to suspend crucibles. Tongs and forceps are for grabbing things that should not be touched by hand.
Some tongs are specially made to hold beakers, others to hold test tubes, and so on. There are also general tongs. Forceps are used to grab small things like solid chemicals that are broken into chunks, so they can be safely handled and added to containers.
Three scoopulas on the left and a number of spatulas to the right. Spatulas and scoopulas are for scooping solid chemicals. They are typically used to scoop a chemical out of its original container onto a weigh boat so that it can be weighed on a balance.
A laboratory thermometer is used for measuring the temperature of liquids. It can be made of glass or it can be a thermocouple made of different metals. A Bunsen burner is a mechanical apparatus that is connected to a flammable gas source.
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