Chemistry Science Fair Projects: Using Acids, Bases, Metals, by Robert Gardner

By Robert Gardner

Ebook by means of Gardner, Robert

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Extra resources for Chemistry Science Fair Projects: Using Acids, Bases, Metals, Salts, and Inorganic Stuff (Chemistry! Best Science Projects)

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Weigh the two vials and their contents together on a balance. Carefully remove the covers from the vials and pour one solution into the other. Be careful not to lose any liquid. Replace the caps on both vials, place them on the balance, and reweigh them. What evidence is there that a chemical change has taken place? Has the chemical change been accompanied by a change in weight? esign and carry out, under adult supervision, an D experiment to show that even when a gas forms in a chemical reaction, the law of the conservation of matter holds true.

Prepare a clear solution by adding the lead nitrate and 50 mL of distilled water to a small container or beaker and stirring with a straw. Prepare a second clear solution in another small container by adding sodium iodide to 50 mL of distilled water. Label the solutions. Fill a plastic vial about one third of the way with one of the solutions. 49 Chemistry Science Fair Projects Pour about the same amount of the other solution into a different vial. Place caps on both vials to avoid evaporation or spilling.

Repeat the experiment with kosher salt. Does salt dissolve in water? Try dissolving a small amount (1/4 teaspoon) of each of the following, one at a time, in half a glass of water: baking soda, baking powder, flour, instant tea, instant coffee, Kool-Aid drink powder, Tang drink powder, vitamin C, aspirin, gelatin, and cornstarch. Which substances are soluble in water? Which are insoluble? Are any of the insoluble substances soluble in hot water? Sugar and citric acid are both white powders with about the same densities.

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