Science, Tech, Math › Science Lemon Fizz Science Project Making Bubbles With Lemon Juice and Baking Soda Share Flipboard Email Print Bonnie Jacobs / Getty Images Science Chemistry Projects & Experiments Basics Chemical Laws Molecules Periodic Table Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated January 06, 2019 The lemon fizz project is a fun bubbly science experiment using kitchen ingredients that’s ideal for kids to try. Lemon Fizz Materials Baking soda (sodium bicarbonate)Lemon juice or a lemon cut into quartersLiquid dishwashing soap (e.g., Dawn or Joy)Food coloring (optional)Spoon or strawNarrow glass or cup The Lemon Fizz Project Put a spoonful (about a teaspoon) of baking soda into a glass.Stir in a squirt of dishwashing liquid.Add a drop or two of food coloring, if you want colored bubbles.Squeeze lemon juice into the mixture or pour in lemon juice. Other citrus fruit juices work too, but lemon juice seems to work the best. As you stir the juice into the baking soda and detergent, bubbles will form that will start to push up and out of the glass.You can extend the reaction by adding more lemon juice and baking soda.The bubbles are long-lasting. You can't drink the mixture, but you can still use it for washing dishes. How It Works The sodium bicarbonate of the baking soda reacts with the citric acid in lemon juice to form carbon dioxide gas. The gas bubbles are trapped by the dishwashing soap, forming fizzy bubbles.