Water: A Liquid That Can Take the Heat

Water

Water is an amazing liquid. Not only is it the main solvent of cellular protoplasm, it also helps moderate climates with its high heat capacity. Water absorbs a large quantity of heat and slowly releases it over a period of time. This is the reason coastal climates are more moderate than climates farther inland. Water’s […]

Petri Dish Electrolysis Activity

This simple microscale electrolysis activity yields 2 pure diatomic gases, hydrogen and oxygen, from water in a petri dish. With the addition of Bogen universal indicator solution to the reaction, pH color changes help students understand what is happening at each electrode in the petri dish.

Petri dish electrolysis is a simple, colorful way to introduce or wrap up many topics in chemistry. Use this activity to introduce reduction-oxidation reactions and electrochemistry. When using it at the beginning of a lesson, you can learn what students already know, while using it at the end can highlight their learning. Student misconception: Electrolytic cells […]

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