what are the signs of a chemical reaction

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The following are signs that a chemical reaction may have occurred:The formation of a precipitate may indicate that a chemical reaction has occurred. …Color changes may indicate the presence of a chemical reaction.Temperature changes are often indicative of chemical reactions. …The production of odor may indicate that a chemical reaction has occurred. …Bubbles may be a sign that a chemical reaction has occurred. …

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  • How do you know if a chemical reaction has occurred?

  • A: Yes, a chemical reaction occurred. You know because the bubbles are evidence that a gas has been produced and production of a gas is a sign of a chemical reaction. Potential signs that chemical reactions have occurred include a change in color, change in temperature , formation of a gas, and formation of a precipitate.

  • What are the signs of a chemical change?

  • In general, the signs of a chemical change are the following: Formation of a precipitate. Production of a gas. Change in colour. Energy change.

  • What are the changes that are visible during chemical reactions?

  • According to scientists, the changes that are visible during a chemical reaction are signs that the atoms in the reactants have been rearranged. What are the signs of physical change from a chemical change? Signs of physical change – Change in appearance,taste,display of substance Signs of chemical change- Change in chemical reaction

  • What causes a chemical reaction to change color?

  • A change in color is just one of several potential signs that a chemical reaction has occurred. Other potential signs include: Change in temperature. Heat is released or absorbed during the reaction.

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