There was nothing for the metal to react with so only

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There was nothing for the metal to react with, so only a physical change could have occurred. The sample was only heated, so neither a physical nor a chemical change occurred. D
2. A student mixes of white crystals with distilled water in a beaker. After the mixture was stirred, no crystals are visible and the solution is clear. After several days, all of the water evaporates and white crystals are found in the beaker. Which of following pieces of experimental evidence would best help the student to confirm that a new compound had not been made and that only a physical change occurred? B C D .
AP Chemistry Test Booklet S4.4 Physical and Chemical Changes Copyright © 2017. The College Board. These materials are part of a College Board program. Use or distribution of these materials online or in print beyond your school’s participation in the program is prohibited. Page 2 of 2

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