Exploring fizzy reactions

In Science Club this week, we looked at fizzy reactions that take place when sherbet ‘flying saucers’, effervescent tablets and bath bombs are added to water. They contain sodium bicarbonate (baking soda) and acid, which react together to produce carbon dioxide gas and produce lots of fizzing and frothing.

We mixed lemon juice (an acid) with bicarbonate and placed a stretchy disposable glove over the top of the glass so the gas could not escape. What would happen?

The glove filled up with carbon dioxide and waved at us!

And then …

The ‘zombie hand’ in action

We investigated changing the amount of acid and bicarbonate, and compared lemon juice with different types of vinegar.