See how fun and easy these little items are.
Source: fruin 2014
Wack-A-Pack balloons are both educational and entertaining. Simply smack the pack with your hand and it self-inflates. The pop is not very loud, but equivalent to the popping of a bag of chips. The balloon then begins to inflate and takes about 30 seconds to completely inflate.
As explained on the package, “Smack the pack and shake THEN QUICKLY THROW ON FLOOR. A chemical reaction of the citric acid (Vitamin C), sodium bicarbonate (baking soda) and distilled water will create a small bang and inflate the balloons.”
When sodium bicarbonate is combined with citric acid (vitamin C) and distilled water, there is a chemical reaction that creates a large bang. When punching the small bag, it causes all these chemicals to react and inflate the bag and balloon inside and causes the bag to explode. This is essentially what gives Alla-Seltzer it's fizz when added to water. The complete neutralization reaction is ....
H3C6H5O7(aq) + 3NaHCO3(aq) --> Na3C6H5O7(aq) + 3CO2(g) + 3H2O(l)
The CO2 gas coming off gives the solution its fizz. Inflated balloons measure 4x3¼x1¼".
This is a teacher's guide pdf that explains the reaction and gives directions on how to work with students to do the experiment in class with inquiry adaptations. (American Chemical Society)
After this activity, students should be able to:
Develop engineering skills with students using small scale ideas to solve for a large scale problem.
Source: http://goo.gl/TdZNXn - TeachEngineering.org