In Science in 1/2, we have been looking at how everyday materials can be physically changed in a variety of ways (ACSSU211) and that different materials can be combined including by mixing for a particular purpose (ACSSU031). 1/2B used the method below to make their very own lemonade this week, however, we’re not quite sure it’s supermarket ready just yet!!
What you’ll need- Lemon, drinking glass, water, baking soda, sugar, straw, teaspoon
Method- Squeeze as much of the juice from the lemon as you can into the glass. Pour in an equal amount of water as lemon juice. Stir in the teaspoon of baking soda. Give the mixture a taste and add in some sugar if you think it needs to be sweeter.
The bubbles that form when you add the baking soda to the lemon mixture are carbon dioxide (CO2); the same bubbles you’ll find in proper fizzy drinks. Of course they add a few other flavoured sweeteners but if you’re wondering how the carbon dioxide bubbles formed, it was because you created a chemical reaction when you added the lemon (an acid) to the baking soda (a base).