Simple Experiments in Physics: Mechanics, Heat, Fluids (Classic Reprint) - Hardcover

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Excerpt from Simple Experiments in Physics: Mechanics, Heat, Fluids

The Extreme Divisibility of Matter. The Molecule. Physical and Chemical Changes.

Experiment l. - Dissolve a pinch of common salt in a test-tube one-third full of water. The solution tastes salty and will continue to taste so even if very much diluted.

In another test-tube make a solution of silver nitrate by dissolving a crystal of silver nitrate in a test -tube one third full of water. To a little of the salt solution add a drop or two of the silver nitrate solution. A white precipitate of silver chloride will be produced. Take some more of the salt solution and dilute it very much. Add silver nitrate. This silver nitrate may evidently be used as a test for salt in solution. Dilute the salt solution so much that you have only a drop or two of it to a test-tube full of water. Add silver nitrate. The white silver chloride still appears.

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