Colour changes show us who Jesus is, and the wrong ways we must avoid, and the
right ways we should choose.
Materials You Need:
Several chopped red cabbage leaves.
Saucepan, strainer and a bottle.
Three clear glasses.
Clear Vinegar (an acid).
Baking Soda (Sodium Bicarbonate - an alkali).
- Chop or shred the red cabbage leaves and place it in a saucepan with 2
cups of water.
- Boil for 15 minutes and then allow the cabbage juice to cool.
- Strain the juice into a bottle. This will be your Indicator
- Prepare three clear glasses three quarters filled with tap water, and
add respectively - (a) a teaspoon of Baking Soda, (b) two teaspoons of
clear Vinegar, and (c) nothing - to the three glasses and label them.
- Pour one tablespoonful of Indicator solution into each of the
- Alkalis change the colour of the solution to green, while acids change
it to red. The last glass containing only cabbage juice gives a
This humble vegetable yields a juice that show us just who Jesus is, and what
love He had for each one of us in dying on the Cross. This experiment
shows colour changes from:
GREEN - that Jesus grew in wisdom and favour with God and man.
RED - that He became our Saviour.
PURPLE - that He is the coming King of Kings!
What do you think of when you hear the word "Acid"? Perhaps you picture a
bubbling liquid that would dissolve away your skin if you touched it.
While there are some dangerous acids such as Sulphuric Acid, there are also
many safe acids that we use daily. For example, Vinegar and lemon
juice are weak acids and have a sour taste.
On the other hand, some substances are Alkali and have a bitter taste so we
do not usually drink or eat these. Baking Soda is an exception and is
used in cake baking to cause them to rise into delicious cakes!
It's interesting that God has provided certain indicators in nature to help us
determine if a substance contains acid or alkali, since it is not safe to
taste every substance. This humble cabbage vegetable shows us just who
Jesus is and what love He has for each one of us in dying on the Cross.
The solution made by boiling Red Cabbage in water, makes an excellent
indicator. Would you like to taste it, it's only cabbage juice!
No? Oh well, when it is mixed with an acid or base, it turns red or
blue-green respectively, due to its chemical make-up.
(Pour equal amounts of Cabbage Solution into each labelled glass and swirl
to mix the contents). Let's observe the changes and line up the
glasses according to colour. We will put the red (acid), then the
blue-green (alkali), and lastly the purple (just juice).
The Blue-Green colour shows us that Jesus grew in wisdom and favour with God
and with man. The time came when Jesus had to taste how bitter it was
to have to die for us, but praise God, to rise again.
The Red colour shows how Jesus was prepared to undergo the acid trial of
shedding His blood on the Cross for the forgiveness of our sins.
The Purple colour shows us that Jesus now wears Royal Robes as the soon coming
King of Kings!
Our Spiritual Indicator:
God has also given us a spiritual indicator as well, to help us know right from
wrong. This is God's Word. Psalm 119:11 says:
"I have hidden Your word in my heart that I might not sin against You."
And so we need to read the Bible daily in order to know what God says about sin
and things He wants us to do. The red for "danger" (acid) can remind us
of things we should not do, and the green for "go" (alkali) can remind us of
things we can and should do. The purple reminds us that there is a
crown waiting for us in Heaven where Jesus will say "Well done, you good and
faithful servant" (2 Timothy 4:7-8).
What about you? Do you spend some time each day reading the Bible and are
you allowing it to guide you? When we hide God's Word in our heart and
memorise it, we are equipping ourselves with our "Spiritual Indicator" that
keeps us from making mistakes. It shows us right from wrong and allows
us to test our words, actions and attitudes against what God has said in His
I hope that you have a "Spiritual Indicator" and that you are using it!