Question

a. safety symbols
below is the list of common safety symbols. in the 2nd column, write down the meaning of each safety symbol. in the 3rd column, write down one (1) example of a precaution you would take related to each symbol.
symbol meaning description example precautions
flammable substance catches fire easily keep away from open flames, heat, sparks
corrosive substance can cause burns wear protective gloves and goggles
toxic substance can be harmful if ingested or absorbed use in well - ventilated areas and use mask
explosive substance can explode due to certain conditions store away from heat and shock sources
oxidizer substance can cause combustion of other materials keep away from flammable materials
biohazard substance is biological a hazard use appropriate decontamination methods and wear protective clothing
biohazard involves biological agents which can pose risk follow proper decontamination procedures
b. safety symbols challenge: real - life lab scenarios: identify the correct safety symbols and precautions for each scenario.
scenario symbol and meaning precautions
scenario 1: the flaming solution
you are heating ethanol over a bunsen burner to observe its combustion.
scenario 2: the acid test
you are diluting concentrated hydrochloric acid with water.
scenario 3: toxic powder mystery
you are weighing out a white powder that is toxic if inhaled.
scenario 4: the unstable mixture
you are given a chemical that may explode if heated or shocked.
scenario 5: biohazard alert
you are cleaning up used petri dishes with bacteria after an experiment.
scenario 6: environmental protection
you accidentally spill a solution labeled harmful to aquatic life near a sink.

Explanation:

For the first part, we identify the meaning and precautions for common safety symbols based on general knowledge of hazardous substances. For the second - part scenarios:

• Scenario 1: Ethanol is flammable, so use the flammable symbol and keep away from open flames.
• Scenario 2: Concentrated hydrochloric acid is corrosive, so wear protective gloves and goggles.
• Scenario 3: Toxic powder requires using in well - ventilated areas and wearing a mask.
• Scenario 4: Unstable chemical that may explode needs to be stored away from heat and shock sources.
• Scenario 5: Petri dishes with bacteria are biohazards, so follow proper decontamination procedures.
• Scenario 6: Solution harmful to aquatic life should be cleaned up carefully and disposed of properly.

Answer:

Symbol	Meaning	Description	Example Precautions
!Corrosive Symbol	Corrosive	Substance can cause burns	Wear protective gloves and goggles
!Toxic Symbol	Toxic	Substance can be harmful if ingested or absorbed	Use in well - ventilated areas and use mask
!Explosive Symbol	Explosive	Substance can explode due to certain conditions	Store away from heat and shock sources
!Oxidizer Symbol	Oxidizer	Substance can cause combustion of other materials	Keep away from flammable materials
!Biohazard Symbol 1	Biohazard	Substance is biological a hazard	Use appropriate decontamination methods and wear protective clothing
!Biohazard Symbol 2	Biohazard	Involves biological agents which can pose risk	Follow proper decontamination procedures

Scenario	Symbol and Meaning	Precautions
Scenario 2: The Acid Test	Corrosive - Substance can cause burns	Wear protective gloves and goggles
Scenario 3: Toxic Powder Mystery	Toxic - Substance can be harmful if ingested or absorbed	Use in well - ventilated areas and use mask
Scenario 4: The Unstable Mixture	Explosive - Substance can explode due to certain conditions	Store away from heat and shock sources
Scenario 5: Biohazard Alert	Biohazard - Substance is biological a hazard	Follow proper decontamination procedures
Scenario 6: Environmental Protection	No specific symbol given in original list but could be considered a general hazard to environment - Substance is harmful to aquatic life	Clean up carefully and dispose of properly