YAY! Chemistry is awesome and I have included some of my favourite experiments in this kit along with my very special Red Cat test tube rack.  Here's what to do with this box:

1. Assemble the test tube rack - first peel off the brown stickers that are there to protect your rack from scratching each other while they were on their way to you in the post!

2. Use a spoon to add some citric acid to a test tube and fill the test tube half way with water.  Give it a shake.

3. Now add a spoon of bicarb to the other test tube and fill it half way with water.  That's it - give it a shake to dissolve the bicarb!

Now the fun bit - add a small amount of indicator powder the indicator to both test tubes, give it a shake and watch what happens! 

{As you will see from your information sheet, citric acid is an acid - make a note of the colour that the indicator turned in acid.  The bicarb is a base.  What colour does the bicarb turn in the indicator? Use your knowledge and the same method as above to test other substances around your house - remember to dissolve them in water first THEN add a drop of indicator!}  

4. Now - back to that test tube rack!  Add the citric acid solution to the bicarb solution and watch what happens.

{Why do you think this happened?  Look at your information card to see what the process of adding an acid to a base is - it starts with an N}

5.  Now this is my favourite, favourite!  Get a bowl and add a couple of small squeezes of your foaming liquid into the bowl.  Now add a spoon of bicarb and some indicator powder - whoa! What a cool reaction!  But this next bit is the best bit!  Add a spoon of citric acid to the mixture - you will love the result.  This mixture is safe to touch so you can play with it - enjoy!

The indicator powder is made from red cabbage. Red cabbage contains an indicator pigment molecule called Flavin. This water-soluble pigment is also found in apple skin, red onion skin, plums, poppies, blueberries and grapes giving them their purple/red colour. Indicators change colour in acid and basic solutions.  The cabbage indicator is a neutral solution which is a purplish colour. Basic solutions will turn the cabbage indicator a green/yellow colour and acidic solutions will turn it pink/red.  

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Acid or base worksheet
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