Chemical tools names

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. Shop all lab burners. Erlenmeyer flasks , like beakers, can be used to mix, dissolve into solutions, and heat or cool solutions. In addition, they can be plugged with stoppers and used to catch vapor or condensed liquid. Graduations are not very accurate. View more flasks. Lab stands also come in many different styles: wire stands, tripods, or heavy support stands.

Wire stands and tripods can hold beakers or flasks over a burner. Support stands pictured are much more versatile and can have various clamps or rings mounted to them to hold several pieces of equipment at once. Browse stands. They can be used to mix or store solutions as well as collect vapor in distillation processes. They can have either round or flat bottoms. Shop all flasks. Funnels are used to pour liquids into narrow-mouth containers such as flasks and bottles.

Buchner funnels pictured are special two-piece funnels for filtering mixtures through filter paper into a filtering flask. See all funnels. Volumetric flasks are used to accurately prepare solutions. A weighed amount of solid chemical is placed at the bottom, and the liquid solvent is added until the fill line is reached.

See more now. Evaporating dishes are used to separate water and solids from a solution by allowing the water to evaporate off into the air. This is usually done by heating the evaporating dish over a burner. View more evaporating dishes.

Filtering flasks are used to filter mixtures through a funnel and filter paper. A tube near the top prevents unwanted pressure buildup. The process can be accelerated with a vacuum pump. Browse filtering flasks. Crucibles are used to melt or burn solid chemicals over a burner. They are made from heat-resistant ceramics to prevent breakage. Shop crucibles.

Crucibles are small-sized cups usually made of clay. They are capable of withstanding high amounts of heat, and therefore, they are used to heat substances at higher temperatures. Funnels are used for the easy pouring of liquids from one container into another. A funnel makes it easy to pour without spilling the liquid on the surface because of a bottle's tight neck. They come in different sizes and are commonly made of plastic or glass. Below is a picture of how it looks like in a laboratory setup:.

Graduated cylinders are the most common pieces of equipment to measure the volume of liquids. They are more accurate than beakers but hold in a lesser amount because of the smaller diameter. It comes with marking on one side for you to measure the volume accurately — hence, the name "graduated cylinder. Droppers are little tubes made of glass that can hold liquids in small amounts.

They come with a pump on the back that helps you suck in liquid and then squeeze it out as drops. Pipettes are another way of measuring the volume of liquids. They are far more accurate than flasks and measuring cylinders of any kind.

They are sometimes used to hold liquids if you intend to transfer them from one container to another. Burettes are also volume measuring devices; however, they are used in measuring how much liquid has been discharged.

You can also use burettes to perform titrations. You can adjust the clamps to adjust the flow of the liquid. Ring stands, rings, and clamps : Ring stands are used to suspend beakers, flasks, etc. Clamps are used to ensure a firm grip on the containers. Tongs and forceps are used to handle, hold and grab containers of different kinds.

Tongs can hold wider tubes, while forceps usually work on smaller containers like graduated cylinders and test tubes. Spatulas and scoopulas are used to scoop out chemicals and solids out of containers and onto a crucible for weighing. They are also sometimes used to mix chemicals. You can use a laboratory thermometer to check the temperature of chemicals, or sometimes to check the temperature rise as well. They can be electronic or have a mercury tube as well. Bunsen burner is a burner that is connected to a heat source.

It comes with an adjustable knob that allows you to control the heat pressure to ensure you have the right amount of heat for your experiment. Gas Jar : It acts as a container in which we prepare a solution or store liquids.

Acid Burette and Alkaline Burette : Both acid and alkaline burettes are used to transfer and measure liquids easily. Kipp's Apparatus : The laboratory equipment takes a solid material and converts it into a gaseous state via liquid actions. Desiccators : is a short glass jar fitted with an air-tight cover, containing some desiccating agent such as sulphuric acid or calcium chloride, above which the material is suspended to be dried, or preserved from moisture.

Glass rod : This handy laboratory equipment is a stirrer that is used to mix solutions. Using EdrawMax should be the best way to draw the shapes we've discussed in this article.