In this fun and interactive session, we explore the chemical reactions between acids and alkalis.

We test these reactions using four different experiments

  • Baking soda and vinegar
  • Sherbet making
  • Balloon inflating
  • Rocket making

Over the course of these experiments, we teach children to understand how the same reaction can be used to cause a variety of different effects.

Children record the results and are encouraged to predict what will happen in the next experiment.

Chemical reactions are an important part of the national curriculum, featuring at every stage from KS1-KS4.

We encourage students to examine what reactions are taking place in these experiments and why the results are occurring.

Age: 4 to 13 years (Infants, Junior and Secondary Schools)

If you think your pupils would enjoy our Fizz, Bang, Pop experiments, why not call our friendly event coordinators now on 020 3372 4300 or email

Zoom Fizz, bang, pop

Fizzy wizzy

Today we are going to be looking into fizzy science, and chemical reaction. You will be taking part in fizzing experiments and making scientific predictions.

Acid meets base

We are going to start with a classic chemical reaction vinegar and baking soda.Lets make a prediction what will happen when mixed together.*Talk with children about their predictions*Use bright food colouring also to make the fizzing stand out, mention youare doing this.What happened? Why?When the baking soda meets the vinegar, there is a chemical reaction as carbon dioxide gas is created and creates all these bubbles causing the mixture to overflow (kind of like when you pour out a fizzy drink too quickly in a glass). Baking soda and vinegar have an acid-based reaction.*Do it a few times with different colour food colourings.

To infinity and beyond

*Hold up a bottle (fruit shoot type)* What’s this? No it’s not a bottle this is our rocket! We are going to launch this use a fizzy experiment.This is an Alka-Seltzer, fizzy tablet taken for headaches, but today it will be rocket fuel.*Talk with children about their predictions* Use bright food colouring also to make the fizzing stand out, mention you are doing this.*GLOVES TO BE AND GOOGLES WORN, Fill the bottle up with water, quickly put in the tablet, shake with lid closed, open lid and place in a beaker lid side down* LIFT OFF!!What happened?The same kind of reaction as before, inside the tablet is acid and base chemicals like the vinegar and baking soda, but they are unable to mix to together as a solid, but when added to water, this breaks it up starting thechemical reaction. The carbon dioxide is trying to escape, the shaking prior really made the reaction more extreme. Because the hole on the bottle is small, it shot out with great force creating our bottle rocket.Let’s try the same experiment with different size bottles and temperature water.What did you find? Why?Less space (small bottles), more of a reaction, hotter the water, the faster the reaction as the molecules are faster moving.

Blow it up

What’s this? A balloon!
How do you blow this up, mouth? Is there another way? I smell an experiment. We will try the two chemical reactions we have * GLOVES TO BE AND GOOGLES WORN, Three plastic bottles, one add water, one warm water and Alka-Seltzer and the other vinegar and baking soda*.* Use bright food colouring also to make the fizzing stand out, mention you are doing this.Let’s make our predictions, which will blow up the balloon 1, 2 or 3?*Talk with children about their predictions*Do the experiment*.It was number 3!In our experiment, the water balloon didn’t inflate much at all. The hot air was not pressurized enough to inflate the balloon. The Alka-Seltzer tablet filled the balloon a little, but the baking soda and vinegar balloon had the best reaction as this was the one to release the most carbon dioxide.