Color Change Tricks

MATERIALS :

• Test tube
• Borax
• Water
• Phenolphthalein
• Glycerine Or Sugar solution

PROCEDURE :

• Take a test tube, fill borax and water mixture to the half  of the test tube.
• Add 2 drops of phenolphthalein.
• The solution change into pinkish red color.
• Add 2 drops of glycerine the color will disappear.
• Again heat the test tube the color will appear.