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1) Formation of a precipitate

2) Usually there is a colour change.

3)Neutralization reactions (also a double displ. reaction) involving an acid and a base form water which is a clue.

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12y ago
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8y ago

A lightning bolt is NOT a sign.

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Q: Which is NOT a sign that a double displacement reaction has occurred?
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What symbols indicate that a chemical reaction has occurred?

The sign equql + or an arrow to right.


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This is a sign of a chemical reaction.


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