Cool Experiment to try at home …. really COOL

1. Mentos fountain …
all you need is a soda bottle with the soda and a tube of mentos…
put the mentos in and stand clear ….. !!!!!
dont try this in the house …
its a mess !!!

2. burn paper with ice ….
all u need is
1. Sodium peroxide – Na2O2

2. Finely chopped tissue paper, or sawdust, or starch.

3. A small chip of ice.

PROCEDURE:

1. Before doing anything, show students a piece of tissue paper and ask: Would I be able to burn this piece of tissue paper with ice?”

2. Tear or cut tissue paper into very fine pieces and place them in a heap on an asbestos/ tile plate, and build it up to a cone which is about 5 cm high in the center.

3. On top of the cone, place a half teaspoon of sodium peroxide.

4. Now show the students the small chip of ice and put it on top of the heap stand back and observe.

and again dont try this inside the house !!!

Floating, Diving Paper Clip

Safety

Make sure you have an adult helping you
Make sure you’re in a place where it’s ok if water spills
Supplies

A cup
A paperclip
Liquid soap
Tap water
Directions

Fill up the cup so that the water makes a slight dome over the top.
Hold your paperclip flat against the edge of the cup and carefully slide it toward the middle of the cup. The paperclip should be floating on top of the water!
Once you have the paperclip floating on the cup of water, you can make it dive to the bottom of the cup! Here’s how: put a drop of liquid soap into the water.

Do a Red and Green Chemistry Experiment at home!

Materials Needed:

a large glass or plastic cup
water
paper towels
Celestial Seasonings Red Zinger tea (or any tea whose main ingredient is hibiscus flowers will do)
a base (such as ammonia, baking soda…)
dish washing liquid
dry ice (you can buy this at King Soopers or Wal Mart for $0.99/lb – you need a minimum of 1 lb to do this experiment)
Preparation:

Make sure you’re working with a parent during this experiment. Dry ice will hurt your skin. ALWAYS wear heavy winter gloves when working with dry ice. Goggles are a good idea too! Also make sure to do this experiment in the sink or somewhere you can get messy.

Ready! Set! Experiment!

Step 1: Make about a half-cup of tea by simply putting a tea bag in water in the cup.

Step 2: Very carefully pour some of your base (ammonia or baking soda work well) into the tea. Add enough such that the red tea turns green! Why does this happen? Zinger tea contains hibiscus flowers, which are acid/base indicators. The tea changes from red to green to indicate you’ve added a base (the baking soda or ammonia).

Step 3: Break the dry ice up into small pieces with a hammer, or by dropping it on the floor inside a bag. Drop a few small pieces of the dry ice into the green tea. Watch closely as the tea turns back from green to red. If the tea doesn’t change colors after awhile, add some more ice. Now, the tea looks nice and red again, but DON’T even THINK about drinking it! You put a base in there, remember? Notice that the gas released is still white and doesn’t change as the liquid changes color.

What’s going on here? When dry ice (solid carbon dioxide, CO2) is added, most of it produces carbon dioxide gas, giving the bubbles, but some of it reacts with water to form carbonic acid (H2CO3). The carbonic acid reacts with the base to neutralize it, bringing it back to the red color (sometimes the tea won’t turn perfectly red again, if that happens, you can always add an acid, like lemon juice, to get the red back)

CO2 + H2OH2CO3

Step 4: And now for the mess… while the dry ice is bubbling through the tea add a few drops of dishwashing liquid. You have created your own bubble machine! As the dry ice goes from solid to gas phase in the water it’s pushing the gases through the tea and the soap to create bubbles.
Clean up: Dump everything in the sink and rinse it well. All done.