Why Does Coke Sink & Diet Coke Float in Water?

Many science teachers perform a demonstration in which they immerse sealed cans of Coke and Diet Coke in a tank of water. The can of Coke immediately sinks, while the can of Diet Coke floats. Some instructors have adapted this demonstration as an experiment to teach students the principles of density and buoyancy.

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Blue ice block closeup

An Explanation of Sodium Acetate & Hot Ice

“Hot ice” refers to a popular chemical demonstration in which a solution of sodium acetate dissolved in water and placed in a freezer instantly solidifies when poured from its container or when a single crystal of solid sodium acetate is dropped into the solution.

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