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Charmaine Sze
Bath bombs are hard packed mixture of dry ingredients which effervesces when wet. they are used to add essential oils, scent, bubbles and color to bathwater.
- 1/2 cup baking soda
- 1/4 cup citric acid in powder form
- 1/4 cup cornstarch
- 2-1/5 tablespoons Epsom salts
- 1-3/4 teaspoons water
- 1/4 teaspoon fragrance oils
- colorant
- Plastic mixing bowl
- Gloves
- Jar with lid
- Molds or ice cube trays
Bath bombs...
-fizz the most with the respective
amount of ingredients in trial 1.
-are best when they are dried in room temperature
https://www.homesciencetools.com/a/fizzy-bath-bombs
https://www.scientificamerican.com/article/sudsy-science-creating-homemade-bath-bombs/
-improve circulation
-put you to sleep
-fight a cold
refrigerated
-could be irritating for people with sensitive skin
Make your own bath bomb!
To investigate how changing the amounts of different ingredients in homemade bath bombs affect their fizziness.
Challenges:
Bath bombs are nothing more than a mix of fizzy ingredients, salts, food coloring, and oils.
-Bath bombs are really fragile
-They need to be kept away from water / moisture
Bath bomb reactions are...
-Acid-base reaction: produces co2 gas
-Weak acid: citric acid
-weak base: baking soda
-Cornstarch: Liquid absorber
3NaHCO3+C6H8O7 --> 3CO2(g)+3H2O+Na3C6H5O7
SOdium bicarbonate + citric acid --> carbon dioxide + water + sodium citrate