From Class Blog: Mixtures vs Reactions

Today in Science we learned about mixtures and reactions. Students were given 2 different substances to add together in their groups and were to decide if they caused a reaction or a mixture. They needed to explain what they saw in order to justify their classification.

Ms. Albrecht then showed the class what happens when you mix Vinegar and Milk. To the surprise of many, the milk curdled – creating a plastic-like substance (also know as a precipitate). We expected it to smell kind of funny – It was like a hot summer day on the farm according to Ms. A. We also noticed a colour change and bubbles (caused by a gas that was created). This checked off almost all the possible visual and olfactory clues that it was a reaction and not just a mixture.

A big thank you to the student volunteer for cleaning out the bowl from the experiment. That one was a mix of “Yuck” and “Cool” all at the same time. Here’s a picture of it on the projector for you to see, if you dare!

Milk and Vinegar

Milk and Vinegar = a Reaction

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