Unlike a standard pencil with a clay and graphite core, colored pencil sets are oil, water and wax-based. In addition, these pencils come in different sizes, quality and pigment proportions to ...
Some coloured pencils are water soluble - water can be brushed over them to blend colours. Water-soluble pencils are usually softer than ordinary coloured pencils and will go blunt more quickly.
Use a toothpick to pull the blue water toward the yellow water. It may take a few tries to get the liquids to join. As soon as the two drops meet, lift the toothpick away and discard it. Do not stir.
The liquids that don't change the color at all are bases. Now that you have a range of reactions for comparison, test island water in the fourth cup. What is your conclusion? Is it acidic or basic?