1. Cut the lemon in half, squeeze out the juice, and bottle the juice with a lid.
Add 100 ml of water to the capped bottle.
3. Put a spoonful of sugar and a spoonful of baking soda into a bottle with a lid. Cover the bottle cap immediately.
4. Put it in the refrigerator for 30 minutes.
Principle: Lemon juice contains a certain amount of citric acid, and baking soda is also called sodium bicarbonate. When they collide, sodium citrate, water and carbon dioxide are produced. Carbon dioxide is easily dissolved in a closed container, thus making a bottle of carbonated beverage.
skill
1. If you have ready-made citric acid, you can add fruit juice to the prepared soda to make carbonated drinks with various flavors.
Don't seal it too tightly, or it will explode.