Why cannot a chemical change be normally reversed?

Explanation

### Step-by-Step Solution:

1. **Understanding Chemical Change**: A chemical change involves the transformation of reactants into products through the breaking and forming of chemical bonds.

2. **Breaking Bonds**: In a chemical reaction, the existing bonds in the reactants are broken. This is a crucial step because it alters the structure of the molecules involved.

3. **Forming New Bonds**: After the old bonds are broken, new bonds are formed to create different substances, known as products. These products have distinct properties that are different from the original reactants.

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