When calcium carbonate and hydrochloric acid react, bubbles form. how do you know a reaction occurred? a gas was formed a precip itate was formed a color change happened the volume changed?
2 answers:
The reason that you can tell that it was chemical is because you can see the bubbles forming. This means that it is giving off a gas.
<u>Answer: </u> The indicator that indicates the reaction has occurred is the formation of gas.
<u>Explanation: </u>
The common indicators of a chemical change has occurred are:
Release of gas from the reaction. Formation of bubbles. Color change Temperature change Formation of a precipitate Specific odor The chemical equation for the reaction of calcium carbonate and hydrochloric acid follows:
As, we can see, gas (carbon dioxide) is being released during the reaction with effervescence.
Hence, the indicator that indicates the reaction has occurred is the formation of gas.
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