Lab Equipment Worksheet

Lab Equipment Worksheet

Lab Equipment Worksheet

Students are required to learn the names and functions of various types of equipment that they may use in Chemistry laboratory activities. This worksheet identifies the most common items and describes what they are used for. Attached to this worksheet is a handout “Common Laboratory Equipment” which shows drawings of each item.

Part I: Description of Lab Equipment

Name / Function / Name / Function
Bunsen burner / Lab equipment which produces a single open gas flame, which is used for heating, sterilization, and combustion / Pipestem “Clay” triangle / Can be placed on a ring clamp to provide a stage for a crucible
Evaporating dish / Device used to evaporate solids and supersaturated liquids / Test tubes / Used for many activities which requires multiple reagents or solutions
Beaker / Probably the most common vessel for holding liquids in the lab / Test tube clamp / May be attached to a ring stand and be made to hold a test tube or thermometer
Retort stand / Used in many lab activities as the support for another apparatus / Iron ring / Often attached to ring stand to use as support for a beaker
Mortar & pestle / tool used to crush, grind, and mix solid substances / Funnel / May be placed in an iron ring. Used for filtration or the delivery of liquids.
Safety goggles / Must be worn for lab activities to protect the eyes. / Wire gauze / Often placed over the iron ring, to provide a “stage” for a beaker
Watch glass / used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, or as a cover for a beaker / Erlenmeyer flask / May be used to hold liquids instead of beakers, when a smaller opening is preferred.
Rubber stoppers & Corks / Used to contain liquids in test tubes and flasks / Beaker Tongs / Used to handle hot beakers and other glassware
Pipets, Micropipets & Droppers / A pipette (also called a pipet, pipettor or chemical dropper) is a laboratory instrument used to transport a measured volume of liquid. / Buret / It is used to dispense known amounts of a liquidreagent in experiments for which such precision is necessary, such as a titration experiment
Wash bottle / Asqueeze bottle with a nozzle, used to rinse various pieces of laboratory glassware, such as test tubes and round bottom flasks. / Graduated cylinder / Used to measure the volume of liquids
Crucible Tongs / Used to handle hot cruciblesor metals / Crucible & cover / container which can withstand high temperature and is used for heating solid substances to a high temperature
24-well plate / is a flat plate with multiple "wells" used as small test tubes / Forceps / Forceps are a handheld, hinged instrument used for grasping and holding objects.
Spatula & Scoopula / A spatula is used to take and handle small quantities of solid chemicals. It serves as a spoon. / Striker / Used to make a spark to light the gas of a Bunsen burner
Test-tube rack / Used to holds many test tubes. / Thermometer / Used to measure temperature
Volumetric flask & pipettes / The most accurate measurement of solutions/liquids available in the lab / Hot Plate / Used to heat substances without an open flame

Part II: Explain which piece of laboratory equipment would be most useful for each of the following tasks:

1)Holding 50 mL of boiling water: ______

2)Melting crystalsto make glass:______

3)Pouring 50 mL of acid from one container to another:______

4)Measuring exactly 43 mL of water: ______

5)Crushing large chunks of sodium chloride:______

6)Adding 10 drops of iodine to a solution:______

7)Suspending glassware over a Bunsen burner:______

8)Removing solid iron shavings from a bottle:______

9)Keeping the contents of a boiling beaker from splattering:______

10) Transferring a hot beaker from a hot plate to cool:______

11-15)Diagram A shows a typical setup for boiling a liquid. In the boxes provided, name the five items used.

Part III: Mini-Lab. The best way to become familiar with a chemical apparatus it the actually handle the pieces yourself in the lab. Great emphasis is placed on safety precautions that should be observed whenever you perform an experiment or use certain apparatus.

  1. Bunsen Burner Demonstration

Safety: Goggles, Flammable

Materials:Crucible Tongs, Striker, Bunsen burner, clay tile, Magnesium

Procedure:

  1. The Bunsen burner is commonly used as a source of heat in the lab. Each has a gas inlet located in the base, vertical tubing in which the gas mixes with air, and adjustable openings or collars in the base of the barrel. These collars admit air to the gas stream. The burner is always turned off at the gas valve!
  2. Check safety…check all hosing for cracks or holes. Make sure safety goggles are on.
  3. Adjust the gas inlet at the base to be 50% open. Adjust the collar at the base of the barrel to be 100% closed.
  4. Turn the gas valve on (referring to a clock = 12:00), and immediately hold the sparker about 5cm above the top of the burner and spark. If you have trouble lighting, turn off Bunsen burner, and contact the teacher for assistance. (CAUTION: Improperly burning will produce the poisonous gas Carbon Monoxide)
  5. There are 2 types of flame: hot flame= blue (very little noise), or safety flame= yellow. Safety flame is not used in the lab to heat substances; it is too cool of a flame and produces soot on materials being burned due to incomplete combustion. When the burner is not being used to heat a substance, the burner should be left on safety flame or turned off. **Never leave a lit Bunsen Burner unattended.
  6. Regulate the flame to about 8 cm above the barrel. Adjust the collar to obtain a sharply defined inner blue cone.
  7. Using forceps and a piece of 5cm magnesium, locate the hottest portion of the flame. Do this by placing the end of the magnesium in the gas closest to the barrel, slowly working your way up the flame. **Do not look directly at the magnesium once lit. DO NOT drop the magnesium onto the lab bench!!!!
  8. Shut off the Bunsen burner.

Answer the following questions. (If you have any questions about the Bunsen burner contact the teacher.)

  • What does the safety symbol represent for this portion of the lab?
  • What type of flame does your burner start with once lit?
  1. Electronic Scale & Triple Beam Balance

Materials:Unknown object, electronic scale, triple beam balance

Procedure:Weigh and record the mass in grams of the unknown object using both devices

  1. Electronic Scale:
  2. Triple Beam Balance:
  3. Which apparatus gave you a more accurate measurement?

Why do you think so?

  1. Graduated Cylinder, Beaker & Flask

Materials:Colored liquid, graduated cylinder, beaker, flask

Procedure:Record the volume in mL in each apparatus.

  1. Liquid volume in graduated cylinder :
  2. Liquid volume in beaker:
  3. Liquid volume in flask:
  4. Which apparatus gave you a more accurate measurement?

Why do you think so?

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