Lab Equipment

Balance Digital Triple beam Measures mass Unit is a gram

Beakers Hold substances Containers Measure liquid volume General measurement Different sizes

Bunsen Burner Heating device Burns a stream of a flammable gas Not invented by German chemist Robert Bunsen Named after him Actually an improvement made by his laboratory assistant on an earlier design by Michael Faraday The improvement is called a Tirrill Burner

Buret Long, vertical piece of glassware Calibrated on its full length Stopcock on the bottom Used to dispense known amounts of a liquid Used when precision is necessary Titration experiments EXPENSIVE !!!

Crucibles A cup-shaped piece of equipment Used to contain substances when heating them to very high temps The crucible is usually made of porcelain Usually has a lid

Erlenmeyer Flask Widely used glass container Has a narrow neck Wide base Can be stoppered or swirled Again general measurment Named after Richard Erlenmeyer German chemist, 1861

Evaporating Dish Shallow bowl with lip Porcelain Used to heat and evaporate liquids

Forceps Hinged instrument used for grasping and holding objects Not called “tweezers” in lab Metal or plastic

Funnels Cone shaped opening Narrow stem Glass or plastic Used to separate spoils from liquids Filter paper cones trap solids

Graduated Cylinder Expensive Measure liquid volume Calibrated accurately Bumper guards on many Different sizes

Mortar and Pestle A tool used to grind and mix substances Pestle is a heavy stick whose end is used for pounding and grinding Mortar is a heavy bowl Often ceramic

Pipets Dropper pipets Plastic pipets Measuring pipets Used to transfer small volumes of liquids

Pipet Pumps Attaches to pipet Uses wheel to draw up liquid Accurately and effectively moves liquid into pipet Controls the dispensing of liquids

Ring Stand A metal support stand Consists of a long upright rod attached to a heavy rectangular base Used with rings and clamps Use in supporting laboratory glassware

Ring Clamps or Iron Rings Connect to ring stand Can be used with wire gauze Support a variety of lab glassware Funnels Beakers Crucibles

Safety Goggles Used to protect the eyes Worn during all labs

Scoopula Metal scoop Used to transfer small amounts of solids

Stir Rods Long, narrow rod Generally glass Used to stir or mix solutions

Stoppers Plug openings in glassware Used to contain liquids in flasks and test tubes Corks and rubber stoppers Different sizes Some have holes Glass tubing Thermometers

Test Tubes Finger length glass tube Sealed on one end Lip on other end for easy pouring Holds small samples, usually liquids Easily heated to boiling Samples easily observed

Test Tube Brush Narrow brush Used to clean test tubes Different sizes Never forced into tube

Test Tube Holder AKA test tube clamp Made out of wire Holds test tubes You hold it in your hand and squeeze on the handles to open the other end

Test Tube Rack Can be made of different materials Can have different shapes Holds test tubes when: A reaction is occurring Observations are made When they are not needed

Thermometer Device that measures temperature The word thermometer is derived from two smaller word fragments: thermo from the Greek for heat meter from Greek, meaning to measure Two important parts: Bulb containing a liquid Scale to measure change

Thermometer Not mercury Generally alcohol based liquid Colored which rises or falls as it expands or contracts with changes in temperature Colored Have roll guard Scales May be two Use Celsius

Tongs Crucible tongs Beaker tongs Used to grab hot or untouchable glassware

Volumetric Flask Come in all sizes Narrow neck Single mark or calibration TC = “To contain” Used to contain or measure a very precise and accurate amount of a liquid Very expensive

Wash Bottles Plastic bottle with spout Different shapes or styles Contain only distilled water unless indicated Used to dispense distilled water To add small amounts to a container To rinse specific glassware

Watch Glass A circular, slightly concave piece of glass Used as a surface to evaporate a liquid Used as a cover for a beaker To prevent dust or other particles from entering the beaker

Weighing Boats Disposable plastic dishes Used to hold substances Placed on balances when weighing

Wire Gauze/Pipe Stem Triangle Used with an iron ring and a ring stand Used to support laboratory equipment while heating wire gauze supports beakers and flasks pipe stem triangle supports crucibles

Spot Plate Made of ceramic or plastic Used to perform reactions on very small amounts of materials