Question

identify each model of a chemical reaction.

Explanation:

1. In the first reaction, two substances combine to form one product, which is a synthesis reaction.
2. In the second reaction, one element replaces another in a compound, characteristic of a single - displacement reaction.
3. In the third reaction, a compound breaks down into simpler substances, which is a decomposition reaction.
4. In the fourth reaction, the positive and negative ions of two ionic compounds exchange places, which is a double - displacement reaction.

Answer:

1. synthesis
2. single displacement
3. decomposition
4. double displacement