The reaction between lemon juice and baking soda is a classic example of an acid-base reaction. Lemon juice contains citric acid, while baking soda is a base known as sodium bicarbonate. When these two substances are combined, they react to form carbon dioxide gas, water, and a salt called sodium citrate. The release of carbon dioxide gas is what causes the bubbling and fizzing effect, which is a hallmark of this reaction.
To conduct this experiment, you will need the following materials: fresh lemon juice (or bottled lemon juice), baking soda, a small mixing bowl, a spoon or stirrer, and a measuring spoon. Optionally, you may also want a small tray or plate to catch any overflow and a timer to measure the duration of the reaction