Open notes test Flashcards
NFPA Diamond
Based on the NFPA Diamond information. What does the NFPA Diamond represent, and what are the four parts of the diamond?
Answer: The NFPA Diamond represents hazards associated with chemicals, and the four parts are Fire, Health, Reactivity, and Special Hazards.
NFPA Diamond
What does a rating of 4 in the fire hazard (top diamond) indicate?
Answer: A rating of 4 indicates that the substance is extremely flammable and will readily disperse through air under standard conditions, with a flashpoint below 73°F (23°C).
NFPA Diamond
What color is used to represent health hazards, and what does a health hazard rating of 2 mean?
Answer: Blue represents health hazards. A rating of 2 means exposure can cause incapacitation or residual injury even if treated.
NFPA Diamond
What does a white diamond with the symbol “OX” indicate?
Answer: The white diamond with the symbol “OX” indicates a special hazard where the chemical is a strong oxidizer.
Lab Safety Notes
What are you prohibited from doing in the chemistry lab regarding food and drinks?
Answer: Food and drink are strictly prohibited in the chemistry lab.
Lab Safety Notes
What safety gear must you always wear while in the lab, and why is it important?
Answer: You must always wear safety goggles in the lab to protect your eyes from chemicals, broken glass, and other hazards.
Lab Safety Notes
What should you do if a chemical comes into contact with your skin or eyes?
Answer: If chemicals come into contact with skin or eyes, you should consult your instructor immediately.
Lab Saftey Notes
What is the proper procedure when diluting an acid in the lab?
Answer: When diluting an acid, always add the acid to the water while stirring slowly to prevent a dangerous reaction.
Lab Safety Rules
Why is it important to never perform unauthorized experiments in the lab?
Answer: Unauthorized experiments may be unsafe without proper instruction and permission from the teacher, potentially leading to accidents or injuries.
Lab Safety Rules
What precautions should be taken when handling glassware and sharp objects in the lab?
Answer: Handle glassware with care, ensure test tubes and thermometers do not roll, and never force glass tubing into a cork or stopper. If glass breaks, notify the teacher immediately to place broken pieces in a proper container.
Lab Safety Rules
Why is it important to keep your work area free of clutter and to properly dispose of lab materials?
Answer: Keeping the work area clean and properly disposing of materials ensures a safe environment and prevents accidents from occurring due to misplaced objects or hazardous substances.
Lab Safety Rules
What should you do if there is a chemical spill or splash on your skin or clothing?
Answer: Notify the teacher immediately and rinse the affected area with water for 15 minutes.
designing an experiment:
What is the difference between an independent variable and a dependent variable in an experiment?
Answer: The independent variable is the variable that is intentionally changed or manipulated by the experimenter (the cause), while the dependent variable is the responding variable that shows the results or effects of the change (the outcome).
designing an experiment:
What is the purpose of a control group in an experiment?
Answer: The control group is the standard to which everything is compared. It is not exposed to the independent variable and helps to determine the effect of the independent variable by providing a baseline.
designing an experiment:
Why are repeated trials important in an experiment?
Answer: Repeated trials are important because the more times the experiment is repeated, the more valid and reliable the results become.
