This is a very common kitchen chemistry experiment, mixing baking soda and vinegar.  Any guesses of the gas that gets produced?  Give it a try, it's all good and safe!

You will need:

Baking Soda (sodium bicarbonate), Vinegar (5% acetic acid), Measuring utensils, Container with small mouth (pop bottle works), Funnel, Balloon

Now try this:

1. Place the funnel into the balloon and add a scoop of baking soda.

2. Add vinegar to the container.

3. Carefully place the balloon over the mouth of the container.  Make sure the baking soda does not fall into the vinegar.

4. Lift the balloon to add all of the baking soda into the vinegar.  For extra security use your hand to hold the balloon onto the container.

5. Observe the gas that is collected in the balloon.

What is happening?

Baking soda is a compound called sodium bicarbonate.  Vinegar is a solution containing a compound called acetic acid.  Sodium bicarbonate and acetic acid react producing a gas called carbon dioxide.  This is a common gas that we produce when we exhale.