CHEMICAL REACTIONS
Chemical Reactions:
A chemical reaction is a process in which
- one or more substances, the reactants, are converted to one or more different substances, the products.
- Substances can be elements or compounds.
- A chemical reaction is represented by a chemical equation, as follows:
REACTANTS → PRODUCTS
It reads: REACTANTS YIELD PRODUCTS
- During a chemical reaction the atoms present in the reactants (also called reagents) break some bonds and form new ones to create different substances called products.
- No elements are destroyed or created, so the atoms on the left of the equation (reactants) must match the elements on the right of the equation (products).
- This “matching” on the left and the right of the equation is attained by balancing the chemical reaction.
- when balancing the chemical equation we CANNOT MODIFY FORMULAS of the substances, we only can change the COEFFICIENTS
Representation of a chemical equation
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