pH indicator

We used red cabbage water to find out if some common ingredients were acidic or alkaline.

We found that vinegar, lemon juice and tartic acid were all acidic.

We found that the dishwashing liquid green colour was very strong when we tried to test it and nothing happened. We also found that bleach turned the indicator colourless!

We will make up some more indicator solution and find some alkaline ingredients.

To do this experiment at home click here  or here (video version)

More information on acids and bases

http://www.wikihow.com/Explain-Acids-and-Bases-to-Kids

http://www.ducksters.com/science/acids_and_bases.php