🧪 Science with Sarah: Invisible ink 🕵️

Hello parents, teachers and students! Here’s a fun experiment that Sherlock Holmes would be proud of, exploring the science of chemical reactions!

Be sure to check out GMSA@9 on Wednesdays when Meteorologist Sarah Spivey does the demonstrations and explains the science behind it.

HERE’S WHAT YOU’LL NEED

• Water
• Baking soda
• Grape juice concentrate (like the stuff in the freezer isle!)
• Index card
• Q-tip
• Paint brush

DO THE EXPERIMENT

• In a cup, mix some water and baking soda. There should be enough baking soda in the water solution so that it looks cloudy
• Using a Q-tip dipped into the baking soda and water solution, draw or write something onto the index card. Allow it to dry
• Paint the grape juice concentrate onto the index card and watch as your drawing magically comes into view. It should look like this ⬇️

HOW IT WORKS

Chemical Reaction

Baking soda is a base while the grape juice is an acid. Whenever an acid and a base combine, some sort of chemical reaction occurs. In this case, the baking soda and water solution turns a darker color, becoming visible!

SCIENCE WITH SARAH

If you’d like Sarah to come to your school and conduct a science experiment live on KSAT, fill out this form. “Winners” are selected at random.