Mini-Peppermint Bath Bombs Dissolve in warm water and soak your feet for 20 minutes. As mini-bath bomb is dissolving, the baking soda and citric acid will undergo a dramatic double-replacement reaction called an acid-base neutralization reaction along with a decomposition reaction creating a lot of carbon dioxide bubbles that will whisk all your troubles and worries away. Enjoy. Happy Mother’s Day & Teacher Appreciation Week from the Chemistry Club. Made with: Epsom salts, baking soda, citric acid, corn starch, sweet almond or coconut oil, distilled water and peppermint essential oil and some have red clay powder.