Safety & Basics Flashcards
Essential safety, gas tests, diffusion basics (20 cards)
What sort of extinguisher should be used for a paper fire?
Water extinguisher
What sort of extinguisher should be used for burning oil spilled on the ground?
Foam extinguisher
What sort of extinguisher should be used for a chip pan fire?
Fire blanket or foam extinguisher
What sort of extinguisher should be used for a magnesium fire?
Sand or dry powder extinguisher (never water)
What sort of extinguisher should be used for an electrical fire?
Carbon dioxide (CO₂) extinguisher
Describe the steps to turn on a bunsen burner so that it is ready to heat a liquid
- Close air hole completely, 2. Turn on gas tap, 3. Light with splint from the side, 4. Open air hole gradually for blue flame
What does the corrosive hazard symbol mean?
Substance that can destroy or damage living tissue and materials
What does the toxic hazard symbol mean?
Substance that is poisonous and can cause serious harm or death
What does the harmful/irritant hazard symbol mean?
Substance that can cause irritation to skin, eyes, or respiratory system
What does the flammable hazard symbol mean?
Substance that catches fire easily and burns rapidly
What is the name of the process that allows the hydrochloric acid and ammonia particles to move through the tube?
Diffusion
Give a full definition of diffusion
The spreading of particles from an area of high concentration to an area of low concentration until evenly distributed
What is the name of Brownian motion?
Random movement of visible particles caused by collision with invisible air particles
Why are the air particles not visible, while the smoke particles are?
Air particles are too small to be seen, smoke particles are large enough to reflect light
Describe how the smoke particles are seen to move
Random, jerky movements in all directions (zigzag motion)
If air was not made of particles, how would the smoke particles be seen to move?
They would not move at all (remain stationary)
What is the test for hydrogen gas?
Lit splint makes a ‘pop’ sound
What is the test for carbon dioxide gas?
Turns limewater cloudy (milky)
What is the test for oxygen gas?
Relights a glowing splint
What are 3 essential lab safety rules?
Wear safety goggles, tie back long hair, follow instructions carefully
