By Cynthia Light Brown, Blair Shedd
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The pH measures how many hydrogen ions are in a substance and ranges from 0 to 14. ENQLHB @BHC a liquid acid found in and produced by ants and many plants. MDTSQ@KHY@SHNM a reaction between an acid and a base that uses up all the acid and base. The products of the reaction are water and a salt and have a neutral pH of seven. 41 Make Your Own 1 2 3 4 5 S\NZf Fill the bottle half full with warm water. Use the funnel to add three tablespoons (45 milliliters) of baking soda. Add a squirt of dish soap.
But it needs a boost of energy or heat, like a match, to get it started. Once it catches ﬁre, the log will burn by itself. That extra energy that’s needed to get a reaction started is called the activation energy. It’s a good thing most reactions need activation energy or things would start burning all by themselves! Some reactions are spontaneous. A spontaneous reaction doesn’t need anything to get it started, it just happens. Rust is a good example. As long as all the chemical reactants are present, iron will rust without any activation energy.
The vinegar dissolves the shell, but did the shell actually disappear? No. The calcium carbonate molecules that make up the shell break up in the reaction and form new molecules, or products. The products of the reaction are carbon dioxide, calcium acetate, and water. The calcium acetate and water are in the vinegar solution, and the carbon dioxide is a gas; it makes bubbles on the surface of the eggs. Under the shell, the egg is encased in a thin membrane. This membrane becomes rubbery because it allows liquid to pass through it.
Amazing Kitchen Chemistry Projects You Can Build Yourself by Cynthia Light Brown, Blair Shedd