Pop Out Streamers
Posted in Posters on 04/21/2008 02:33 pm by admin
Help!!!!!!!?
ok i kno this sounds like im cheating but i desperstely need help here!!!!!
i need help on a vinegar rocket launcher.
i need the hypothosis.
Materials:
Cork with streamers attached with a tack
1 quart pop bottle
1/2 cup vinegar
1/2 water
1 tsp baking soda
4 x 4 inch paper towel
Directions:
Add the water and vinegar to the bottle
Place the baking soda in the center of the paper towel
and twist ends to keep the baking soda from falling out
Outside in the yard, drop the paper towel with the baking
soda into the bottle and put the cork on tight
Stand back away from the cork and bottle and watch as
the baking soda reacts with the vinegar and shoots off
the cork!
What’s Going On?
The baking soda mixes with the vinegar to form carbon dioxide gas. As the gas forms, pressure builds up inside the bottle and eventually forces the cork to pop.
it says: what is the effect of the different materials in the launcher?
i need hypothosis!
What you need to start you off is the equation:
CH3COOH + NaHCO3 —-> CH3COONa + CO2 + H2O
Then you can draw up a hypothesis!
Hallowe’en at Hogwarts
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