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Salt Volcano – Rainbow Eruption in a Jar

A fun and colorful science project that combines chemistry and creativity, resulting in vibrant eruptions that captivate kids and spark curiosity.
Prep Time 10 minutes
Total Time 10 minutes
Course Activity, Science Project
Servings 1 project

Ingredients
  

Materials

  • 1 jar A clear jar or container Ensure it's safe for use with vinegar.
  • 1-2 inches Salt (table salt or coarse salt) Adjust for desired eruption effect.
  • 1 cup Baking soda This helps create the eruption effect.
  • 1 cup Vinegar Various types can be used, such as apple cider.
  • a few drops Food coloring (various colors) Choose rainbow colors for vibrant eruptions.
  • 1 set Small measuring cups or spoons For mixing and measuring ingredients.
  • 1 spoon Spoon for mixing
  • 1 tray Tray for easy cleanup To catch any overflow.

Instructions
 

Preparation

  • Place your clear jar or container on a tray to catch any overflow and ensure it is clean and dry.
  • Pour a layer of salt into the jar, aiming for about 1-2 inches deep. You can use different types of salt for varied textures.
  • Sprinkle a layer of baking soda on top of the salt.

Color Preparation

  • In separate cups, mix vinegar with food coloring to create rainbow colors like red, blue, yellow, and green. A few drops of food coloring are sufficient.

Eruption

  • Carefully pour a colored vinegar mix over the salt and baking soda layers.
  • Watch the vinegar combine with the baking soda, creating an eruption of bubbles and colors!

Observation

  • Encourage participants to observe the differences in flow and eruption based on layering and colors used.
  • Take photos or videos for keepsakes!

Notes

Experiment with different types of vinegar for unique effects, adjust the ratios for varying eruptions, or add edible glitter for extra sparkle.
Keyword Eruption Project, Kids Activity, Rainbow Eruption, Salt Volcano, Science Experiment