Answer:
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Step-by-step explanation:
In a replacement reaction, also known as a single displacement reaction, one element or ion in a compound is replaced by another element or ion.
One way to know if a replacement reaction has taken place is by observing a change in the physical or chemical properties of the substances involved. This may include changes in color, temperature, or the formation of a precipitate (a solid formed from the reaction of two aqueous solutions) or gas.
Additionally, if one of the reactants is a metal and a different metal is produced as a product, or if one of the reactants is an acid and a different acid or base is produced as a product, it is likely that a replacement reaction has occurred. Chemical tests can also be used to confirm the presence of a new compound.