Thames & Kosmos Space Gummy Candy Lab handleiding

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Thames & Kosmos

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Handleiding

3. Red cabbage

indicator

You will need:

Small red cabbage, knife, cooking pot,

spoon, water, strainer, glass jar

Here’s how:

Ask an adult to help you with this

experiment.

Chop up the leaves of a small red

cabbage.

Place the chopped cabbage in

a cooking pot and add enough

water to completely submerge the

cabbage.

Place the pot on the stove. Set

the stove burner to high and

bring the contents of the pot to

a boil. Let them boil for about 15

minutes. Then, remove it from the

heat and let it cool.

After the pot has cooled, use the

strainer to separate the cabbage

from the liquid in the sink,

keeping the liquid.

Store the liquid in a small, clean

glass jar. Attach a label to the jar.

KITCHEN

CHEMISTRY

Hmm... cabbage

flavored gummies?!?

GEEK

OUT!

WHAT’S

HAPPENING?

In this experiment, you made a

purple solution called an indicator.

You will use this indicator in the

next experiment. Red cabbage

contains substances called

anthocyanins. These substances

are pigment molecules that change

color depending on the acidity of a

solution. By cutting up the cabbage

and boiling it, you broke down the

cabbage tissue that contained the

anthocyanins. The anthocyanins

were released into the solution,

turning the water purple. In the

solution, the anthocyanins can

easily move around and react

to chemicals added to

the solution.

Safety Note: Caution!

High temperatures.

There is a risk of burns.

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