Red cabbage PH indicator

When I made braised red cabbage for Christmas dinner one year, I noticed red cabbage cooked down to blue color, then turned to red again after put some balsamic vinegar and apples. 

Then we tried this experiment.

Materials:
Red cabbage, blocking paper.

First we cooked red cabbage in water.  This is the red cabbage soup, smelly and blue.
 

Now we are going to add different house hold things in . Let's see what happen.

From left to right: Bicarbonate of soda, Rice vinegar, Kids bady wash (with PH balanced), Lemon juice

Square beaker as the control

From left to right: with Bicarbonate of soda, rice vinegar, kids body wash, lemon juice in the soup

The bicarbonate of soda will dissolve as a alkaline solutions which makes the soup dark green.
The rice vinegar and lemon juice are acid, which make the soup pink or red.
The kids body wash with PH balanced on the bottle makes the blue soup turns to purple.

We made indicator paper strips as well. This is the photo girls are using the indicator paper.

The left over cabbage soup was not wasted. It became the main ingredient of witch portion.

Main ingredient: cabbage soup , Daddy's shaving foam. Mixing them up with extra care!