In this demo, the teacher creates a beautiful rainbow of colours in a demonstration tube using universal indicator and a dilute
acid and base.
Universal indicator can be used to illustrate an entire range of pH conditions because it is made up of a mixture of different
indicators that change colour at different pH values. As an acid is diluted with water, its pH increases—but never above pH 7.
Likewise, as a base is diluted, its pH decreases—but, again, never below pH 7. Continue reading
Everyone loves the incredible edible egg, but what about a green one? Today we’re coming at you with three kitchen egg demos that will bounce, denature, and colorize you into total chemical bewilderment! Continue reading
This demonstration shows some differences between potable (drinkable) water and non-potable (non-drinkable) water. Variations in temperature, turbidity and pH level also determine the types of microorganisms that can thrive in each water sample. Continue reading
Hold a reaction in your hand, literally, as students observe and ask questions. Continue reading
Our pools are full of disinfectant chemicals that keep then free of microorganisms, but what you might not realize is that those same chemicals are interacting with, well, you. Today we’re talking poolchem, and we’re going to answer that age old question that’s been pondered in the back of every deep end swimmer’s mind – is it really okay to pee in the pool?
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The lesson here is a good one and it applies to all your favorite demonstrations—they make terrific inquiry labs for your students!
This video is part of the Flinn Scientific Best Practices for Teaching Chemistry Video Series, a collection of over 125 hours of free professional development training for chemistry teachers –http://elearning.flinnsci.com
ATTENTION: This demonstration is intended for and should only be performed by certified science instructors in a safe laboratory/classroom setting.