1.

Instructions:

What we need?

- Beaker
- Spoon
- Baking soda (50 ml)
- Vinegar (20 ml)
- Food colors

- Put 50 ml of baking soda to beaker.
- Measure 20 ml of vinegar to measuring cylinder.
- Add drops of food color to baking soda
- Use pipet to drop vinegar into baking soda
- Observe the reaction


2.

Instructions:

What we need:

- Bottle
- Air balloon
- Baking soda (25 ml)
- Vinegar (100 ml)
- Paper

- Draw a face to balloon
- Put 100 ml of vinegar into bottle
- Use paper to put baking soda inside the air balloon
- Place balloon into the bottle
- Drop baking soda inside the bottle
- Observe

Questions:

- What did you see?
- How we know that chemical reaction happened?
- What gas formed to the bottle?