This term, since we touched on the topic of acids, alkalies and bases, I decided to do an experiment about natural indicators. I got this idea from the textbook, as I saw that there was actually somethings in the world that could measure the acidity of mixtures. So, I researched a little on the topic of natural indicators and I found one which really interested me. I remember seeing that vegetable somewhere before, but I was not sure if I could still find it. The fruit was purple cabbage. So, I went for a hunt for purple cabbage. And after searching many supermarkets, I finally found it, and was very excited on starting this experiment.
And then I started the experiment:
Firstly I sliced up the purple cabbage
Next, I boiled some hot water and placed the the purple cabbage into the hot water, to extract te juice out of it. Here is my own video on the process of extracting the purple natural indicator out of the cabbage.
Thereafter, I used the natural indicator to measure the acidity of 5 different mixtures found at home. Here is another of my own video:
Here are the pictures I took:
Finally, this is the powerpoint for my ACE:
No comments:
Post a Comment