We bought some red cabbage (it's actually purple in colour)
Want to show that the purple pigment can be extracted and it's alkaline in nature. So if you add some vinegar (acidic) it changes colour... (hehee... too chim for son's "Show and Tell")
Breaking the cabbage into smaller parts and add some water.
Add some heat...
Water changes colour...
And it's purple! (in a white plastic cup)
Add some acid, it will change it's colour...
Well, i doubt the kids understand what is happening, at least they enjoyed the tearing of the cabbage into pieces and seeing the water changing it's colour.
hmm... see what we can do next week, CNY is coming, manybe some deco for the house?
This is xiao mei posing for a pic while doing the experiment... hehee...
