Question

In acid-base titration, the equivalence point is

O when moles of acid and base are equal
O the end point
O when the volume of titrant equals the volume of the aliquot
O when there is a color change

Answer 1

The correct answer is option 4. In an acid-base titration, the equivalence point is when the moles of acid equal the moles of base, signifying complete neutralization, whereas the end point is indicated by a color change due to an indicator.

Step-by-step explanation:

In acid-base titration, the equivalence point is when the stoichiometric amount of titrant has been added to react completely with the analyte, which means the moles of acid and moles of base are equal. This is different from the end point, which is signaled by a color change due to an indicator and ideally should be very close to the equivalence point. However, the volume of the titrant does not necessarily equal the volume of the analyte; rather, volumes are used to calculate the concentration of the unknown solution based on the stoichiometry of the reaction and the known concentration of the titrant.

It is important to remember that the equivalence point and the end point are not always the exact same point in titration, but a properly chosen indicator will make them very close. The equivalence point represents the moment in a titration curve that depicts the complete neutralization of the acid by the base or vice versa, which is essential for determining the concentration of an unknown solution.