A cylindrical piece of glassware with coarse markings. Used to hold liquids, but should not be used for measurements of volume where precision is needed.

You are watching: What is a clay triangle used for


Bunsen burner

A metal tube with two valves and an inlet for natural gas. The valve on the base controls the flow rate of gas; the valve on the side controls the amount of oxygen in the gas mixture. Tutorial




A long, thin cylindrical piece of glassware with a stopcock on one end. Used to deliver liquids with very high volumetric precision.




Used in conjunction with a ring stand to hold equipment in place. A clamp holder screws in to both the ring stand and the clamp.


Clay triangle

A triangular device made of heat-resistent clay. Used to hold crucibles and porcelain dishes heated by a Bunsen burner. Distributes heat evenly over the surface of objects it holds.



A porcelain dish capable of withstanding extreme heat (e.g., from a Bunsen burner). Used to heat solids to high temperatures. Cover with lid to avoid mass loss.



A clear, rectangular vessel of glass or plastic used to hold solutions for spectrometry. Don"t place its ribbed sides in the light path of the spectrometer!





Flask, Erlenmeyer

A tapered flask with an opening thinner than the base and coarse volumetric markings. Erlenmeyers are used to hold liquids but should not be used for measurements of volume where precision is needed.


Flask, Filtering

A heavy Erlenmeyer flask with an inlet for vacuum and an opening that fits a Buchner funnel. When connected to vacuum and capped with a Buchner funnel, used to filter mixtures of solids and liquids.


Flask, Volumetric

A round flask with a long, thin opening bearing one mark. The mark corresponds to the volume indicated on the flask. Used to prepare solutions and measure liquids very precisely.


Funnel, Buchner

A porcelain or plastic funnel containing many small holes and a rubber stopper around its nozzle. Used in conjunction with a filtering flask to filter mixtures of solids and liquids.


Funnel, buret

A funnel containing a relatively thin nozzle that fits into the top of a buret. Used to deliver liquids without making a mess!


Funnel, powder

A funnel containin a relatively wide nozzle. Used to deliver solids without making a mess—essential in precise preparation of solid-liquid solutions.



Graduated cylinder

A thin cylinder containing many markings. Used to measure liquids with moderate precision.



Hot hands

Glove-like sleeve made of a rubbery and thermally insulating polymer. Used to handle hot glassware.






LabQuest data acquisition device

A handheld device that contains several ports for probes (see below) and a USB port for a flash drive. The touchscreen is best controlled using an accompanying stylus.


LabQuest pH probe

A probe with a delicate electrode at its base, used to measure pH of liquid solutions. Should be stored in solution when not in use, and should always remain wet during experiments. Must be calibrated using buffers of known pH.


LabQuest pressure probe

A boxy probe with a Luer lock inlet, used to measure the pressure of gases. Maximum pressure reading of 2 atmospheres.


LabQuest spectrophotometer

A large probe with a USB cord and slot for cuvettes. Used to measure absorption spectra of pure liquids or liquid solutions. When used with solutions, must be calibrated with pure solvent.


LabQuest temperature probe

A thin metal probe used to measure temperature of liquids or solids.




A multimeter is used to measure current or voltage across two points in an electrical circuit. Connect the black lead to COM and the red lead to "VΩmA." Use the dial to adjust the quantity measured and the scale of measurement.





Pipet bulb

The pipet bulb is a blue, balloon-shaped device made of rubbery polymer that fits onto the end of pipets. Squeeze the bulb, place on the end of the pipet, and release to draw up liquid.


Pipet, Pasteur

Pasteur pipets are small glass pipets that lack markings used to transfer small amounts of liquid and/or add liquid dropwise. Use the small tan Pasteur pipet bulbs with Pasteur pipets, rather than the large blue bulbs.


Pipet, serological

A thin cylindrical piece of glass or plastic with a conical nozzle and many markings. Used to deliver liquids with moderate precision. Push out entirety of contents when using.


Pipet, volumetric

A thin cylindrical piece of glass with a bulb near one end and a single mark. The mark corresponds to the volume indicated on the pipet. Used to deliver liquids with very high precision. Do not push out the last bit of liquid—just allow gravity to do its work.




Ring stand

A stand with a wide metal base and a single metal rod. Clamps and clamp holders attach to the rod.


Rubber policeman

A wedge-shaped piece of rubber with an opening that fits onto the end of a glass stirring rod. Used to fish out goopy solids and other stubborn buggers in the bottom of flasks.




A curved piece of metal in the shape of a half-pipe with a tapered end. Used to transfer solids. Don"t stick it directly into a solid jar if you"re being careful.


Spectroscope, handheld

Also called a "spectrometer," this device uses diffraction to separate an incoming light beam into individual wavelengths. The separated beams fall on a wavelength scale in nanometers, allowing one to measure the wavelengths of light in the incoming beam. Tutorial



A piece of flint held inside a small bowl and attached to a metal piece that can be rapidly slid across the flint to create a spark. Used to light Bunsen burners.



Test tube

A tube-shaped piece of glass used to hold liquids and solids for observation. Comes in small, medium, and large sizes. Don"t fill more than three-quarters full if you"re being careful.





Wash bottle

A bottle made of flexible plastic with a thin, angled nozzle. Used to hold liquids (usually water) for spraying or delicate delivery. Useful for adding that last bit of liquid during solution preparation in a volumetric flask.


Watch glass

A shallow, wide piece of glass used to hold solids for drying or observation. May also be used to cover beakers or Erlenmeyer flasks to minimize evaporative losses.


24-Well plate

A plastic plate containing twenty-four cylindrical valleys. Used to hold and compare many mixtures.

See more: What Is 30/42 In Simplest Form, Simplify Or Reduce Fraction 30/42


Wire gauze

A "blanket" of criss-crossing wires placed on top of a ring and used to hold a vessel such as a crucible or porcelain dish.