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ChemistryChemistry
9 July, 16:17

Chemical reactions can be detected by change in:

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Answers (2)
  1. 9 July, 19:24
    0
    We can tell if a chemical reaction has taken place when one or more of the following things happen:

    There has been a colour change inside the reaction flask.

    A gas has formed. Usually we know a gas has formed when we can see bubbles ...

    A solid has formed.
  2. 9 July, 20:07
    0
    A colour change

    A gas has formed.

    A solid has formed.
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