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21 March, 11:56

Chemical reactions can be detected by change in:

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  1. 21 March, 12:02
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    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. 21 March, 12:21
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    A colour change

    A gas has formed.

    A solid has formed.
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