Final answer:
Substances in the laboratory, such as paraffin wax, must be carefully dispensed using sterilized tools like pipettes to maintain safety and avoid contamination. Strict adherence to lab safety guidelines, such as sealing chemical containers and using equipment properly, is essential.
Step-by-step explanation:
All substances, including paraffin wax, must be dispensed with utmost care in the laboratory to prevent contamination and accidents. It is crucial to utilize appropriate dispensing tools, such as sterile pipettes or dispensers, to transfer chemicals from their original containers to the required receptacles. Laboratory protocol dictates that no substances should be handled directly with hands, ensuring that equipment like pipette pumps and sterile pipettes are always used.
When working with flammable substances like paraffin wax, it's imperative to follow the safety guidelines provided by the educational institution or lab manager. This includes instructions on how to handle flammable chemicals, ensuring that they are never exposed to an open flame or heat source unless specified by the teacher or lab supervisor. Moreover, all chemical containers should be sealed after use, and heat sources like Bunsen burners should be turned off immediately after the practical session to prevent any accidents.
Additional safety measures include cleaning all laboratory materials thoroughly, such as test tubes and beakers, to prevent cross-contamination with other chemicals in future experiments. All glassware, disposables such as swabs, and applicator sticks should be maintained and refilled as necessary to support ongoing lab activities. Finally, never eating or drinking in the lab is a fundamental rule as chemical residue on surfaces could be ingested, leading to serious health consequences.