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Effervescence Task

Posted: September 3rd, 2010, 1:20 pm
by Jim_R
Discussion for the Effervescence task.

Re: Effervescence Task

Posted: September 7th, 2010, 1:24 pm
by Flavorflav
Baking soda and vinegar has been done to death. I wish they would have allowed Mentos and Coke, just for some variety. I suspect it wouldn't travel as well, though.

Re: Effervescence Task

Posted: September 19th, 2010, 5:19 pm
by Lieficheep
Flavorflav wrote:Baking soda and vinegar has been done to death. I wish they would have allowed Mentos and Coke, just for some variety. I suspect it wouldn't travel as well, though.
haha... I can see the burst open coke bottles already...

Re: Effervescence Task

Posted: October 20th, 2010, 7:24 am
by rocketchicka
Is there any other reaction you could use? I want to do something cooler than vinigar and baking soda......lol
Maybe something that reacts with water? Of course they would all probly be considered hazardous...

Re: Effervescence Task

Posted: October 20th, 2010, 10:08 am
by Dark Sabre
Alka-seltzer works with water, but it is even less cool than baking soda and vinegar :?

Re: Effervescence Task

Posted: October 20th, 2010, 11:12 am
by DeltaHat
The rules only say that the only liquids you can have are water and vinegar. They say nothing about dumping two solids into the water that then dissolve and react. Technically, any aqueous chemical reaction is legal, as long as it's safe.

Also, vinegar is an acid and can be mixed with more than just baking soda.

Re: Effervescence Task

Posted: October 20th, 2010, 11:24 am
by DeltaHat
Calcium Carbonate (Tums antacids) + Acetic Acid (vinegar) => http://www.youtube.com/watch?v=1hbbA-Qz9jE
Will react faster if the calcium carbonate is ground before adding to the vinegar.

Re: Effervescence Task

Posted: November 21st, 2010, 3:27 pm
by courage7856
Question: If the gas from the reaction fills the balloon, is that considered a parallel task?

Re: Effervescence Task

Posted: November 21st, 2010, 3:35 pm
by lonestar
courage7856 wrote:Question: If the gas from the reaction fills the balloon, is that considered a parallel task?
Most likely no, because the chain of events is definitely linear. On a flowchart diagramming the tasks, the reaction task and the balloon inflation task would not both branch off from the same previous task. The previous task would directly cause the reaction, and then the reaction would directly inflate the balloon.

Re: Effervescence Task

Posted: December 1st, 2010, 6:54 pm
by courage7856
lonestar wrote:
courage7856 wrote:Question: If the gas from the reaction fills the balloon, is that considered a parallel task?
Most likely no, because the chain of events is definitely linear. On a flowchart diagramming the tasks, the reaction task and the balloon inflation task would not both branch off from the same previous task. The previous task would directly cause the reaction, and then the reaction would directly inflate the balloon.
This has been added to the national site as a clarification. And the answer is no, it is allowed. You were correct! But it's always good to know for sure.