Let’s see how much you’ve picked up with these experiments and the reading – answer as best as you can. (No peeking at the answers until you’re done!) Just relax and see what jumps to mind when you read the question. You can also print these out and jot down your answers in your science notebook.
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1. You mix together two chemicals and notice that the outside of the container feels like ice. What type of reaction is it?
2. You test a solution with litmus paper and find that there’s no change in the color of the paper. Is it acidic or basic?
3. You need a source of oxygen for an experiment. How would you generate it? Would you use a catalyst?
4. Your fish tank is registering a pH of 6.8. Is your tank acidic or basic?
5. What type of reaction is a campfire? Nail rusting? Turning lead into gold?
6. You have two test tubes that both contain a clear gas. One is hydrogen, the other oxygen. Which one will ignite with a match? Why doesn’t the other ignite?
7. You have two containers, one with lightweight helium and the other with heavier neon gas. What happens to the temperature of both when you squish the containers down to half their original size?
8. What is the difference between a highly corrosive acid and a strong acid?
9. How many protons are in a copper atom? How many electrons? Neutrons?
10. What’s a ‘mole’? Why bother using the ‘mole’ to measure stuff in chemistry?
11. What are the most dangerous chemicals in your set?
12. What are the most important lab skills to master in this unit?
13. You want to build a vehicle that runs only on sunlight and water (no batteries). Draw out the experiment you would use to get energy from water. What type of chemical reaction are you using?
Need answers?
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