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Description
Flashcards by Annette Hendley, updated more than 1 year ago
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Created by Annette Hendley
almost 12 years ago
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| Question | Answer |
| Acids are useful but the can also be .........? | Dangerous |
| Who cleans acid spills on roads? | Firefighters |
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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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