FunWhy does the effervescent tablet bubble?

Why does the effervescent tablet bubble?

Ingredients in effervescent tablets include sodium bicarbonate and an organic acid, such as citric, ascorbic, and acetylsalicylic. When it comes into contact with water, sodium carbonate dissociates into two ions: the hydrogen carbonate ion (HCO3-) and the sodium ion (Na +). The first reacts with the acid in the tablet and gives rise, among other compounds, to carbon dioxide (CO2), a gas that forms small rising bubbles that explode when in contact with air.

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