What and where is the equivalence point?
Is it in the beginning of the experiment or at the reaction point?
I figured out it is the beginning of my chart.
I don't know what your chart looks like but I wouldn't think it would be the beginning of it. Slide down and see what I wrote to Sarah in that long discussion about equivalence point. Or I can help if you still don't understand.
The equivalence point is a concept used in analytical chemistry to describe the point in a titration where the amount of reactant added is stoichiometrically equivalent to the amount of another reactant in the solution. This is typically observed when an acid reacts with a base or vice versa.
The equivalence point is not a physical location but rather a theoretical point. It occurs when the moles of the two reacting substances are present in the exact stoichiometric ratio as specified by the balanced chemical equation. At this point, all of the reactants have been completely consumed, and the reaction is complete.
In terms of where it occurs during a titration experiment, it depends on the specific reaction being conducted. The equivalence point can occur at different stages in the experiment:
1. If the titration involves a strong acid and a strong base, the equivalence point is usually in the middle of the reaction. This is because the reaction between a strong acid and a strong base is very rapid and complete.
2. If the titration involves a weak acid and a strong base, the equivalence point generally occurs closer to the end of the reaction. This is because the reaction between a weak acid and a strong base is slower and requires more titrant to neutralize the acid.
3. If the titration involves a weak base and a strong acid, the equivalence point is closer to the beginning of the reaction. This is because the reaction between a weak base and a strong acid occurs quickly and completely.
To determine the exact location of the equivalence point in an experiment, a suitable indicator or a pH meter is used. These methods help identify the point at which the solution reaches its neutral or endpoint pH, indicating the completion of the reaction and the equivalence point.