Graphs, like concentration vs. time graphs, help us understand what happens during chemical reactions. They show us how the amounts of reactants (starting materials) and products (results) change over time until things settle into a balanced state called equilibrium. This is when the amount of reactants forming products is equal to the amount of products turning back into reactants.

Here's a breakdown of the process:

1. Initial Phase:

   • At first, reactants quickly change into products.
   • For example, in the reaction where substance A turns into B (A ⇌ B), the amount of A goes down while the amount of B goes up.

2. Equilibrium Phase:

   • After a while, the graph flattens out. This shows that the amounts of A and B stay the same.
   • Equilibrium is reached when the speed of the forward reaction (A to B) is the same as the speed of the reverse reaction (B back to A).

3. Le Chatelier's Principle:

   • Graphs can help us predict what happens when we change things like concentration or temperature.
   • For example, if we add more A, the reaction shifts toward making more products. You can see this change in the graph as a rise in product concentration.

Using these graphs makes it easier to predict and understand how chemicals behave during reactions.