7.2 Evidence of a Chemical Reaction
7.2 Evidence of a Chemical Reaction
7.2 Evidence of a Chemical Reaction
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<strong>7.2</strong> <strong>Evidence</strong> <strong>of</strong> a <strong>Chemical</strong> <strong>Reaction</strong>:<br />
Changes occurring at the atomic and<br />
molecular level determine whether a<br />
chemical reaction has occurred.<br />
• Only chemical analysis that shows that the initial<br />
substances have changed into other substances<br />
conclusively proves that a chemical reaction has<br />
occurred.<br />
• <strong>Chemical</strong> reactions may occur without any<br />
obvious signs, yet chemical analysis may show<br />
that a reaction has indeed occurred.
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