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:
Melting crystals to make glass Pouring 50 mL of acid from one container to another 2) 3) 4) 5) Measuring exactly 43 ml of water: 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 reagent bottle: 9) Keeping the contents of a boiling beaker from splattering: 10) Transferring a hot beaker from a hot plate to cool: 11) Notching copper shavings from a solid block: 12) Mixing many different solutions to compare pH: 13-17) Diagram A shows a typical setup for boiling a liquid. In the boxes provided, name the five items used. 18-20) Diagram B shows a typical titration lab setup. In the boxed provided, name the three items used, Diagram A: Boiling a liquid Diagram B: Chemical Titration 18 13 19 14. 15 20. 16. 17
The Correct Answer and Explanation is :
Answers to the Lab Equipment Worksheet
Part I:
- Melting crystals to make glass: Crucible – Used for heating substances to very high temperatures.
- Pouring 50 mL of acid from one container to another: Beaker or Graduated Cylinder – A beaker is used for transferring larger volumes, while a graduated cylinder is for more precise measurements.
- Measuring exactly 43 mL of water: Graduated Cylinder – Ensures accurate liquid measurement.
- Crushing large chunks of sodium chloride: Mortar and Pestle – Used to grind substances into finer particles.
- Adding 10 drops of iodine to a solution: Dropper or Pipette – Delivers small, controlled amounts of liquid.
- Suspending glassware over a Bunsen burner: Ring Stand and Clamp – Supports glassware for heating.
- Removing solid iron shavings from a reagent bottle: Spatula or Scoopula – Transfers small amounts of solids.
- Keeping the contents of a boiling beaker from splattering: Watch Glass – Covers beakers to prevent splatter.
- Transferring a hot beaker from a hot plate to cool: Tongs – Safely handles hot glassware.
- Notching copper shavings from a solid block: File – Used to make fine adjustments to metal surfaces.
- Mixing many different solutions to compare pH: Test Tubes and Test Tube Rack – Organizes solutions for comparison.
Diagrams:
Diagram A (Boiling a Liquid): 13. Ring Stand
14. Iron Ring
15. Wire Gauze
16. Beaker
17. Bunsen Burner
Diagram B (Chemical Titration): 18. Burette
19. Clamp
20. Erlenmeyer Flask
Explanation (300 words)
Understanding the names and functions of laboratory equipment is crucial for conducting safe and effective experiments in a chemistry lab. Each piece of equipment is designed for a specific purpose, ensuring precision, safety, and efficiency.
For example, measuring exact volumes of liquids requires the use of a graduated cylinder, which provides precise readings due to its narrow structure and clear markings. Heating substances, such as melting crystals, often involves a crucible, as it is designed to withstand extreme temperatures without breaking. A mortar and pestle is used for grinding solids into smaller particles, which increases surface area and facilitates reactions.
Safety is paramount in the lab. Tools like watch glasses prevent dangerous splatter during boiling, while tongs protect users from burns when handling hot glassware. The use of ring stands and clamps ensures that apparatuses like beakers and flasks are securely held in place, reducing the risk of spills or accidents when working with heat sources like a Bunsen burner.
In titration experiments, a burette is essential for delivering precise amounts of a titrant to achieve an accurate endpoint. Supporting tools like clamps and Erlenmeyer flasks further aid in the setup, ensuring stability and efficient mixing.
Learning to identify and correctly use laboratory equipment minimizes errors, prevents accidents, and enhances the reliability of experimental results, which is a cornerstone of scientific practice.