THE COKE'S MYSTERY

WE NEED

• A bottle of Coke
• Salt

HOW TO DO IT

1. Predict what would happen if we add salt to a bottle of Coke.
2. Go to the playground.
3. Stay in a big circle around the bottle of Coke.
4. Let the teacher add salt to the bottle.
5. Observe the results. What has happened?

PREDICTIONS

RESULTS

The coke has got carbon dioxide (CO2) dissolved. Carbon dioxide can "scape" from the coke if some bubbles are "created". To create bubbles, we must separate water molecules (H2O). The composition of the salt helps the water molecules to separate and to liberate the carbon dioxide by creating bubbles.

COKE (CO2 + H2O)

+

SALT - breaks H2O - CO2 scapes

=

GAS BUBBLES

MY OPINION

I liked this experiment and I want to do more experiments with the girls. I hope that next day their behaviour will be better and that we will have a great time learning science!

By Nerea