Hazards & Risks Flashcards

All 7 cards in this deck

Give the two purposes of hazard symbols on containers.

To indicate the dangers associated with the contents, and to inform people about safe-working precautions in the laboratory.

What does the 'oxidising' hazard symbol tell you about a substance, e.g. potassium manganate(VII)?

It provides oxygen, so other substances burn more fiercely.

What precaution should be taken when preparing chlorine gas in the laboratory, and why?

Use a fume cupboard, because chlorine is a toxic (poisonous) gas.

What precaution should be taken when using concentrated hydrochloric acid, and why?

Wear gloves and goggles/safety glasses, because concentrated hydrochloric acid is corrosive (burns skin and eyes).

What does the 'corrosive' hazard symbol tell you about a substance?

It eats away at whatever it comes into contact with and can cause serious burns to the skin and eyes.

e.g. concentrated sodium hydroxide solution

What does the '(highly) flammable' hazard symbol tell you about a substance, and what precaution follows?

It ignites easily, so keep it away from naked flames and sparks, such as a lit Bunsen burner.

e.g. ethanol

What is the difference between a hazard and a risk?

A hazard is the thing that is able to do harm, e.g. a flammable liquid. The risk is the likelihood that harm actually happens, e.g. lower if the liquid is kept away from flames.