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Criado por Annette Hendley
mais de 9 anos atrás
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Questão | Responda |
Acids are useful but the can also be .........? | Dangerous |
Who cleans acid spills on roads? | Firefighters |
Image:
toxic (image/png)
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Poisonous substances can cause death |
Why are acids in food safe but not in cleaning materials? | Acids in food are much more diluted. |
Why do hydrangeas have different colour flowers in different areas? | Depends on if the soil is acidic or alkaline. |
acidic solution on red litmus paper | stays red |
neutral solution on red litmus paper | stays red |
alkaline on red litmus paper | turns blue |
acidic solution on blue litmus paper | turns red |
neutral solution blue litmus paper | stays blue |
alkaline solution on blue litmus | stays blue |
What happens if an acid and base get mixed? | They neutralise each other |
What gives the red flames in fireworks? | strontium |
Where does the green in fireworks come from? | Barium |
Where does the blue come from in fireworks? | from copper |
What happens if you mix baking powder and vinegar | Lots of bubbles form |
What happens if you mix iron powder and sulfur powder | mixture glows brightly when heated |
What happens if you mix sand and water? | Sand sinks to the bottom of the water |
Corrosion is the same as...? | Rust |
What is the flammable gas given off when a metal reacts with a acid? | Hydrogen |
Is limescale a base or an acid? | Base |
What causes acid rain? | Pollution |
Which buildings are in danger because of acid rain? | Limestone and marble |
Three things fire needs to start and continue burning | oxygen thermal energy fuel |
Who first studied chemistry | Alchemists |
Who helped to discover oxygen? | Antoine Lavousier |
Chemical formula of Nitric Acid? | HNO3 |
Chemical formula for sulfuric acid? | H2SO4 |
Chemical symbol for phosphoric acid | H3PO4 |
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