Let’s Talk Trash! MAY-JUNE 2022
©2021-2022 The Keenan Group, Inc 6
Project Manager AARON WOLFE
aaron@usstn.com c: (615) 982-2998 It’s Science! STEP 1. w: (615) 227-2275 f: (615) 746-5211
In a large bowl mix together the baking soda and cornstarch. Stir in the water and mix until completely
Fizzy Sidewalk Paint
blended. STEP 2.
Divide the mixture into separate contain- ers and add a few drops of food coloring to each one. Stir well. STEP 3. Paint can be applied with sponge brushes but pouring the paint from a spoon or bottle is much easier.
What is happening? Baking soda - Chemical name, sodium bicarbonate with formula NaHCO3 Vinegar - A dilute solution of acetic acid in water. Acetic acid is also known as ethanoic acid, with the formula CH3COOH. When vinegar and baking soda are first mixed together, hydrogen ions in the vinegar react with the sodium and bicarbonate ions in the baking soda. The solid baking soda mixxes with the liquid vinegar to produce carbon dioxide gas. This is the fizzy reaction you will notice as you spray the baking soda paint with the vinegar from your spray bottle.
PAINTING TIPS: Be aware that the paint mixture will settle quickly and be thick on the bottom. Some of the food coloring may also separate. Just stir again before using.
STEP 4. Then spray with vinegar and watch the cool fizzing effect.
WARNING: Test an area first. Food color can stain.
Source: littlebinsforlittlehands.com/summer-science-experimen • primaryconnections.org.au/themes/custom/connections/assets/SBR/data/Chem/sub/baking/baking.htmts-outdoor-play/
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