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Description

Make a volcano (Leaders Information)

Resources

Baking Soda/Bicarbonate of Soda (make sure it's not baking powder)
Vinegar
Plastic cups
A tray to hold everything and avoid a big mess!
Paper towels or a cloth (just in case)
Red food colouring

Instructions

Instructions
• Place 2 tsps baking soda into your cup
• Pour in approximately 30ml vinegar and a couple of drops of food colouring
• Watch as the reaction takes place!

Discussion:

Ask the Brownies to predict what they think will happen. Why?

What's happening?
• The baking soda (sodium bicarbonate) is a base while the vinegar (acetic acid) is an acid. When they react together they form carbonic acid which is very unstable, it instantly breaks apart into water and carbon dioxide, which creates all the fizzing as it escapes the solution.

• For extra effect you can make a realistic looking volcano. It takes some craft skills but it will make your vinegar and baking soda eruptions will look even more impressive!

What would happen if you changed the amount of vinegar or bicarb?

Acknowledgement/Source
http://www.sciencekids.co.nz/experiments/vinegarvolcano.html

Attachments/Template needed for activity?
No

Tags

• IGG
• interest badge
• science
• science experiments
• Trefoil News
• Trefoil News Spring Edition 2017
• volcano

Badge Links

• Scientist - Vinegar