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First, not all chemicals react when mixed. Second, chemicals may not have a change detectable by human senses, such as a change in pH.

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Two chemicals start to bubble when mixed This show is us a chemical reaction occurring?

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Of course! almost any reaction in aqueous soloution is reversable. All reactions go both ways. Temperature, catlysts, pressure affect. The trick is to make the reaction go the way you want it to go so as to produce the desired result. I personally do not know what reaction reguarding vinegar you are referring to. Remember the equals sign on a chemichael reaction goes both ways! JCF


What does the HAZCHEM sign mean?

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Why is it a sign of a chemical reaction if gas is given off?

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This sign doesn't exist.


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What is the sign of the enthalpy change for an endothermic reaction?

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Is there such a thing as a bad birth sign?

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