What is an spontaneous reaction that can be demonstrated using common household ingredients?
Please be detailed and include the reaction formula if possible.
Edit:
I am aware of baking soda and vinegar, but need another one. Must be safe to demonstrate.
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M$7 Answers
the list includes many that you might be familiar with - it is copied below:
Hydrogen Bubbles
Making a Volcano
Making Volcanoes
Volcano in a Bottle
Growing Mould
Green Penny
Shiny Coins
Fighting Plaque
Swirled Milk
Soapy Froth - vinegar and washing powder
Salt Crystals
Coloured Crystals
Make Sloppy Slime
Rocket Cola - mentos and cola! wow they show this one on Youtube!
Bobbing Raisins
Speedboat Matchsticks
Swimming Fish
Run away Pepper
Wriggle Worm
http://www.kids-science-experiments.com/cat_reaction.html
WORTH checking them all out, some are just so easy and quick!
Here's another site with 12 different experiments like making slime, a borax snow crystal, colored fire, the old mentos rocket again :) Some very clever experiments, not all based on quick results but well worth checking them out - like making hot ice!
http://chemistry.about.com/od/homeexperiments/tp/homeprojects.htm
These two sites had the best selection, the easiest to perform and most are low cost.
See if these videos give you some ideas too - there are a few on Youtube to say the least!
http://www.youtube.com/watch?v=AanRrqZx2Gk
http://www.youtube.com/watch?v=5bho96R1sK4
And I like Science Bob :)
http://www.youtube.com/watch?v=wPz9uIM5oXY
I hope these help - the lists are fairly comprehensive
see above
science tutor
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M$
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M$
"NaHCO3 (aq) + CH3COOH (aq) ----> CO2 (g) + H2O (l) + CH3COONa (aq)"
There's a variety of nasty reactions that can occur with some household cleaners as well. For example, mixing bleach and ammonia can result in chlorine gas being released (with other possible dangerous chemicals as well).
"2(parts)NaOCl + 2NH3 --> 2NaONH3 + Cl2."
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M$
1. Hot Can + Cold Water...
Add a small amount of water inside the can and heat the can for a few seconds. After a while, drop this can upside down in a basin or a container with cold water. This will have an impact on the can making it pop and shrink.
2. Adding color inside the egg...
This is a bit self explanatory but fun to do! First boil egg for a while then take it from the boiling water and gently crack some of its shell then bring it back to the water. Put some food coloring in it while boiling it again.
The food coloring will just go through the cracks giving color or yes, design/pattern in the egg's surface when you peel out the shell.
3. Borax polimer...
You need to have, PVA Glue, borax and food coloring to see how everything happened. :)
Add borax in a small amount of water then mix thoroughly. After that, put some food coloring of your choice so that you'd see how Borax and the glue will react together and what they will form. Then add the glue.
You'll end up with something that looks like clay but when it dries up, it's a bit like rubber.
Of these three experiments, I'd suggest the first one. This is a great example of spontaneous reaction. :)
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M$
After 5 minutes record the temp.
Now, put steel wool in a jar of vinegar for one minute.
Take the steel wool out and place in the jar with the thermometer.
After 5 minutes, record the temp.
Doesn't cause smoke, but will certainly heat up, due to the coating being eaten away by vinegar.
The iron in the steel rusts. Rusting is iron + oxygen., which releases heat. Rusting causes the mercury in the thermometer to expand and rise.
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M$
As soon as you drop a Mento into the soda it really goes crazy.
I saw it on MythBusters. It's like a rocket goin off.
TV
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M$http://www.youtube.com/watch?v=A3oV4rqjcew
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you are welcome, I love experiments :D
Lovely!!!! :))) thanks for this!
Do you know which ones (of those) are spontaneous reactions?
The hydrogen experiment, the volcanoes with mentos, the soapy froth are all spontaneous types you can use - from the first link. The hot ice ( which others have suggested ) and the Make Ice Cream in a Baggie from the second link would also qualify