Disappearing Eggshell

Materials:

1 Egg
Vinegar
Bowl

Procedure:

Place an egg into a bowl, cover the egg with vinegar and leave for 24 hours.

Reference:

DaveHax. "Egg Shell Experiment - Dissolves in Vinegar". YouTube, 13, May 2016. https://www.youtube.com/watch?v=9I5bhUwm1t0

Science Behind this: Vinegar is acidic, and has the ability to break down substances. In this experiment, the vinegar is breaking down the calcium carbonate in the eggshell

CaCO3 + 2CH3COOH --> Ca(CH3COO)2 + CO2 (gas) + H2O

Classic Volcano

Materials:

200 mL Bottle
1 tbsp baking soda
1 tbsp soap
2 tbsp water
1/2 cup of vinegar
1 tbsp red food coloring
Cup
Bowl

Procedure:

(Tip: use clay or paper mache to form a volcano shape around the bottle)

Step 1: In a bowl, combine baking soda and soap, add the water and mix thoroughly. Pour this mixture into the 200 mL bottle.

Step 2: In a cup mix the vinegar and food coloring.

Step 3: Pour the vinegar mixture into the 200 mL bottle.

Step 4: Eruption!

Step 5: Experiment with different amounts of baking soda and vinegar! How does the eruption change?

Reference:

MocomiKids. "Baking Sode Volcano Experiment - Science Projects for Kids". YouTube, 13, Jan. 2012. https://www.youtube.com/watch?v=nFZhbEi19M8

Science Behind this: The volcano 'erupts' due to a neutralization reaction. The vinegar (acid) reacts with the baking soda (base) releasing carbon dioxide, which makes the mixture foam and forces the mass to flow out of the bottle.

H3C6H5O7 + 3NaHCO3 --> NaC6H5O7 +3CO2 +3H2O

Diaper Dissection

Reference:

Sick Science!. "The Baby Diaper Secret - Sick Science! #017". YouTube, 12, Jan. 2011. https://www.youtube.com/watch?v=VTU3JNAlOG8

Materials:

1 Diaper
Scissors
1 Large Ziplock bag
Cup
Water

Procedure:

Step 1: Shake the diaper to loosen it up. Then cut the diaper down the middle, place the diaper in the ziplock bag.

Step 2: Shake the ziplock bag, until you see a fair amount of white granules at the bottom.

Step 3: Pour the white granules into the cup.

Step 4: Pour water into the cup and mix.

Step 5: Flip the cup like a DQ blizzard!

Science Behind this: Disposable diapers contain sodium polyacrylate which is a superabsorbent! It absorbs water by the process called osmosis. This is a synthesis reaction!

C3H3NaO2 +H2O --> C3H5NaO3