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In a beaker sugar is dissolved in water and then the water is heated and evaporates The sugar is recovered and heat is again applied Vapor is released and the material in the beaker changes from?
Wiki User
∙ 15y ago
In a beaker, sugar is dissolved in water, and then the water is heated and evaporates. The sugar is recovered, and heat is again applied. Vapor is released, and the material in the beaker changes from white to black. What must you know to determine if a chemical change occurred?
CO2 (carbon dioxide) CuO (oxidized copper) H2O (distilled water) H2O2 (hydrogen peroxide) NaCl (sodium chloride)
Wiki User
∙ 15y ago
The sugar dissolved in water will crystalize as the water evaporates, leaving behind solid sugar crystals. When heat is applied again, the sugar will begin to decompose, releasing vapor which consists of water, carbon dioxide, and other gases. The material in the beaker will change from solid sugar crystals to a mixture of gases and potentially some remaining residue.
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