Chemistry Issue or Topic
I have to do a scavenger hunt for my chemistry class and I am stuck on quite a few things.
The rules are that I can't use the same item for more than one category, I may not use a chem lab, and everything must fit in a shoebox, which is what I will turn it in in. I can earn extra points for creativity.
I will list all of the categories. I already have ideas for some, which I will put in parenthesis in case it's a bad idea so someone can tell me.
Answer the Question
1. An element (aluminum foil?)
2. A heterogeneous mixture (I have this thing of candies that are shaped like fruits)
3. A homogenous mixture (chocolate?)
4. A gas-liquid solution (soda?)
5. A malleable substance (play-doh?)
6. A solid-liquid solution
7. A substance which has a volume of 1 cm3
8. An edible example of a physical change (apple sauce?)
9. An edible example of a chemical change
10. A pure compound which contains ionic bonds
11. A pure compound which contains covalent bonds
12. A mixture that can be separated by filtration (fruit cocktail in syrup?)
13. A mixture that has been separated by some other method than filtration (I would boil the water out of saltwater and collect the salt, but I want to use salt for sthg else)
14. A substance with a density less than 1g/mL
15. A substance with a density more than one
16. A substance which contains a polyatomic ion (table salt?)
17. An acid (vinegar? it's only 5% acid, though)
18. A metal (tool from stepdad's toolbox?)
19. A non-metal (cardboard?)
20. An inert gas (helium or neon? How would I get either one into the shoebox?)
21. An alkaline earth metal (I know what they are, but not how to obtain one)
22. Immiscible liquids (oil and water?)
23. A toy wich demonstrates a physical change (a crayon? bubbles?)
24. The result of a chemical change
25. A mole
EXTRA CATEGORIES:
26. A substance with tetrahedral geometry
27. A base with a pH greater than 9 (baking soda?)
28. A polymer (a piece of plastic?)"
ANSWERS:
1. also beer can, coca-cola can, copper wire, iron nail
2. heterogenous means consisted of two phases - sand in water(solid+luquid), oil in water (immiscible liquids)
3. air (homogenoues mixture of gases), water solution of sugar, salt and so on, vinegar
5. lead, copper, aluminum, coins
14. oil, water at RT (0.999), ice
15. glass
16. gypsum SO4(2-)
17. solid citric acid
19. carbon (graphite, charcoal)
20. helium and neon are very expensive, laboratories use argon.
Remember, inert gas is not equal to noble gas (also inert). Nitrogen is also inert (not reactive). Some electrical tubes giving color lights contain small amounts of noble gases). Older electric tester screwdrivers use miniature neon lamps (orange-red), now LED diodes are used
21. magnesium
25. 18 g of water or 58.5 g of salt or 55.8 g of iron
26. silicates (sand, quartz), diamond
Tips and Tricks
- also (from M. A. Tiefert):
- 7. a sugar cube? or carve a piece out of Ivory soap or some other soft-ish soap
- 8. melting ice cream
- 10. table salt
- 11. sugar
- 13. whiskey (unless it's illegal, if you're too young to 'possess' it)
- 14. fingernail polish remover (probably)
- 15. most any metal
- 16. not table salt. hmm... detergents contain phosphates, or ammonia, or vinegar
- 25. heh - surprise the teacher with the kind of mole that digs up the garden
