Chemistry Query!

On March 29th we had a Chemistry themed Query! event. During our baking soda and vinegar reaction demonstration we practiced using curiosity to power scientific learning. There were different variables the kids to study like shape of glass, amount of baking soda, and color of vinegar. As soon as the reactions started foaming from the lips of the thin, tall vase the entire group got excited. We took turns volunteering hypotheses to questions like:

What color will the foam be if we use blue baking soda and red vinegar?

What will happen if we start with the vinegar and put the baking soda on top?

Will the shape of the glassware change the reaction?

This new take on a classic experiment even interested the adults in the room and we soon had many ideas blossoming. We learned adding soap to the baking soda slowed the foaming reaction. Several kids touched the foam and learned it was not smooth like usual bubbles (in fact, it was gritty)! Soon we were asking what exactly was inside the bubbles and we used chemical formulas to find out. By looking at the chemical reaction between baking soda (NaHCO3) and vinegar (C2H4O2) we learned carbon dioxide is produced and therefore could be what was inside the bubbles. 

We carried this new discovery into our next demonstration. We started by pouring baking soda and vinegar into a cup. Because carbon dioxide is produced we can "pour" it on top of a candle to stop the flame. We also learned that dry ice is frozen carbon dioxide. We added soapy water to dry ice to create bubbles filled with CO2. We had fun popping the bubbles and watching the opaque gas wisp away. 

Overall, it was a very productive two hours for both the parents and the kids. While the parents were away studying the kids were learning in their own way. If you are interested in attending the next Query! installment please fill out our registration form located on the right bar. We are currently planning our Botany/Biology themed Query! happening this April 12th.

Hope to see you soon,

Elle

Outreach Coordinator

Science Association of Women