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Home » Early Years Science » Baking Soda Powered Boat

Baking Soda Powered Boat

Modified: Sep 28, 2023 · Published: Sep 25, 2013 by Emma Vanstone · This post may contain affiliate links · 11 Comments

This baking soda powered boat is a great mini engineering challenge for kids. It involves lots of scientific thinking and is a fantastic hands-on science activity.

Little scientists need to think about how the gas produced by the reaction between the baking soda and vinegar will escape and if this will be powerful enough to make the bottle move across the water. Other design factors include weight and the streamlining of the bottle.

How to make a baking soda powered boat

You’ll need

  • Empty water bottle – small
  • Baking Soda ( bicarbonate of soda )
  • Kitchen roll or tissue
  • Scissors
  • Straw
  • Vinegar
  • Tape
  • Bath or large container
  • Water
Baking soda boat made with a small plastic bottle

Baking soda boat instructions

  • Pierce a hole in the non lid end of the water bottle and poke the straw through. Depending on the size of the bottle, you may need to trim the straw.
  • Tape around the gap to prevent air escaping and keep the straw in place.
  • Carefully pour some vinegar into the bottle and replace the lid.
  • Pour some baking soda onto a small piece of kitchen roll ( kitchen towel ) and roll it up.
  • Stand over your water, stuff the tissue wrapped baking soda into the bottle and quickly add the lid.
  • Place the boat in the water and watch it go.

The bottle boat should move across the surface of the water and you will see bubbles of gas escaping.

Baking Soda boat

Troubleshooting

If the boat doesn’t move check it’s not too heavy.

How does it work?

Vinegar (an acid ) and bicarbonate of soda ( an alkali ) react together to neutralise each other. This reaction releases carbon dioxide gas, which is the bubbles you see.

The force of the movement of the carbon dioxide out of the straw causes a reaction force which pushes the bottle forward through the water.

More things to think about

Factors that might affect the movement of the bottle boat are wind, the weight of the boat and the amount of baking soda and vinegar used

Last Updated on September 28, 2023 by Emma Vanstone

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Safety Notice

Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources.

These activities are designed to be carried out by children working with a parent, guardian or other appropriate adult. The adult involved is fully responsible for ensuring that the activities are carried out safely.

Reader Interactions

Comments

  1. Natalie F

    September 25, 2013 at 1:35 pm

    How fun! I am certainly pinning this idea!

    Reply
    • ScienceSparks

      September 29, 2013 at 6:54 pm

      Thank you. xx

      Reply
    • Ashlyn Thomas

      October 26, 2019 at 4:59 pm

      I am doing this experiment in 6th grade

      Reply
  2. MsXpat

    September 25, 2013 at 3:21 pm

    This looks like fun! I’ll give it a go and tell you how we got on :0)

    Reply
    • ScienceSparks

      September 29, 2013 at 6:53 pm

      ooooh please do. x

      Reply
      • None-ya-business

        September 13, 2019 at 6:51 pm

        This experiment is fun!

        Reply
      • Butt

        November 01, 2019 at 2:50 am

        Thank You for the idea \. I am totally going to do it.

        Reply
  3. Trisha @ Inspiration Laboratories

    September 25, 2013 at 6:32 pm

    Awesome! Glad it worked out like you planned. 🙂

    Reply
    • ScienceSparks

      September 29, 2013 at 6:53 pm

      Thanks Trisha. xx

      Reply
  4. #melmar

    March 23, 2014 at 2:07 am

    Hi, Found your idea on pinerest! We are going to feature it on our blog in a round up of vinegar and baking soda science! – pop over and see it later this week! My boys will love this during the summer months!
    http://imhereshesthere.wordpress.com/

    Reply
  5. Deb

    June 02, 2015 at 2:49 am

    What do you mean by “kitchen roll?”

    Reply

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