2007-01-15 08:38:07 · 7 answers · asked by raxer 2 in Science & Mathematics ➔ Chemistry
I've got a cool one.
1. Get an American penny.
2. Scrape opposite edges of the penny with a file.
3. You should see a silver colour come through (zinc)
4. Soak this penny in Muriatic Acid (available at any hardware store).
5. Leave overnight and the penny will be hollow in the morning.
Muriatic acid (HCl) reacts with the zinc inside (and not the copper on the outside). Hydrogen gas bubbles will "bubble-out" the zinc, leaving a tissue thin hollow penny.
2007-01-15 08:49:44 · answer #1 · answered by Brendan R 4 · 1⤊ 0⤋
i latterly judged a Jr. intense technology straightforward. the countless straightforward initiatives have been fairly imaginative. "They colour of cool"Can the colour of shingles influence the temperature of a house? "night Writers" - How does lack sleep influence your motor skills? they had human beings not sleep all night giving them typing try at countless factors of the night and after issues like eating a cup of espresso. "The unpopables" - Which sort and/or style of popcorn has fewer un popped kernels ? there have been assorted that have been large. yet those are those that I submit to in ideas because of the fact the perfect
2016-10-31 04:47:58 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Not quick, but lots of fun: Show that a weak solution of NaOH will convert a soda can to Al(OH)3 over a few days, but the concentration of NaOH will remain constant. Use redox reactions to show how this occurs.
2007-01-15 08:46:01 · answer #3 · answered by dukefenton 7 · 0⤊ 1⤋
explore a facet of the relationship between water and gravity (as in the specific gravity of water is one) see the gravitational anomalies recorded by chemistry experiments done on board the space shuttle. contrast each experiment to show the "laws" of thermodynamics as relative. for a title you might use, 'the "0-G" laws of thermodynamics'
2007-01-15 09:01:10 · answer #4 · answered by punk bitch piece of shit 3 · 0⤊ 0⤋
Put different brands of marshmallows in the microwave and compare how much they puff up in different amounts of time.
You can make a graph of the different brands compared with the time in the microwave compared with the size of them before/after microwaving.
It deals with Charles' gas law.
2007-01-15 08:49:33 · answer #5 · answered by sarahg 3 · 0⤊ 0⤋
Anything with a highly exothermic reaction.
Watch CSI? Try making your own fingerprinting powders, including luminescents and test them on different surfaces. Not exactly quick, but it should earn you a decent grade.
2007-01-15 08:48:22 · answer #6 · answered by Dee 3 · 0⤊ 1⤋
a gas that will force everybody to do your bidding.
2007-01-15 08:41:34 · answer #7 · answered by Anonymous · 0⤊ 1⤋