What ingredients/chemicals are included in bath bombs and how do they make the bath bomb dissolve completely?

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llltkl | College Teacher | (Level 3) Valedictorian

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Bath bombs consist primarily of sodium bicarbonate and/or some other soluble bicarbonate or carbonate and citric acid. The citric acid is white-like, crystalline powder substance at room temperature. However, sometimes organic acid is used, instead, to make bath bombs. The bath bomb mixture formulates a fizzing action resulting from the acid-base combination. The fizzing occurs once the citric acid and sodium bicarbonate comes in contact with water. At this point, the bath bomb starts to dissolve. Carbon dioxide gas is produced and other core contents are activated, as well, releasing fragrant essentials, sparking glitter, coloring, and oils into the bath water. The chemical reaction that occurs is:

`C_5H_7O_5COOH + NaHCO_3 rarr C_5H_7O_5COO^(-) Na^+ + H_2O + CO_2`