Do now! Can you continue yesterday’s experiment?

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Presentation transcript:

Do now! Can you continue yesterday’s experiment? Don’t forget lab coats and goggles!

Neutralisation

Neutralisation What happens when we add an acid to an alkali?

Hydrochloric acid + sodium hydroxide

Hydrochloric acid + sodium hydroxide Sodium chloride + water

Hydrochloric acid + sodium hydroxide Acid + alkali Sodium chloride + water “salt” + water

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Hazard Symbols

Hazard Symbols

Hazard Symbols

Hazard Symbols

Chemical Hazard Symbols Corrosive – dissolves metals, stone and skin Irritant – harms eyes and skin Flammable – burns easily Toxic – poisonous

Chemical Hazard Symbols Corrosive – dissolves metals, stone and skin Irritant – harms eyes and skin Flammable – burns easily Toxic – poisonous In your groups can you design a symbol for each one. You have 10 minutes after which you will have to present and explain each symbol to the class.

Hazard Symbols IRRITANT FLAMMABLE TOXIC