Reactants and Products in Chemical Transformations
Chemical transformations involve the conversion of reactants into products. This process is represented by chemical equations that must be balanced to respect the conservation of atoms.
Definition: Reactants are chemical species that react together and are consumed, while products are chemical species that are formed during the reaction.
An example of a chemical equation is:
C + O₂ → CO₂
Example: The combustion of hydrogen: 2H₂ + O₂ → 2H₂O
This equation demonstrates the need for balancing to ensure the conservation of atoms on both sides.
Highlight: The conservation de la masse lors d'une transformation chimique 4ème is a crucial concept, stating that the mass of reactants equals the mass of products.
Chemical transformations can also be used to identify specific chemical species. For instance, there's a test for identifying CO₂.
Vocabulary: Test d'identification du dioxyde de carbone refers to a specific method used to detect the presence of carbon dioxide in a sample.