What are the indicators for a double replacement reaction?
ie. is gas with an odour always produced?
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Answer:
Two compounds with positive and negative ions.
A difference in electro negativity or reactivity between the anions or cations.
One of the new compounds in the product must be somewhat insoluble so that it comes out of solution.
Explanation:
For a double replacement to take place there must be two positive and two negative ions.
(
A must be able to replace B. This will only happen if A is more reactive that B.
must be insoluble so it forms a solid and comes out of solution.
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