How can we say that in a given change a chemical reaction has taken place.
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Answered by
3
Explanation:
look look basically the reaction takes place between two chemicals and the product will be of two chemicals either b added or evolved you see the product and and the two chemicals reacting then you will find the answer if it is addition or evolved
Answered by
7
Answer:
We can tell if a chemical reaction has taken place when one or more of the following things happen:
1.There has been a colour change inside the reaction flask.
2.A gas has formed. Usually we know a gas has formed when we can see bubbles. ...
3.A solid has formed.
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