Question

When you use a lower concentration of a titrant, how does it affect the amount of titrant needed? Explain.

A. The amount of titrant needed increases because it's less diluted.
B. The amount of titrant needed decreases because it's more diluted.
C. The amount of titrant needed remains the same.
D. The amount of titrant needed is unpredictable.

Answer 1

The amount of titrant needed when using a lower concentration increases, because there are fewer reacting molecules per volume, which necessitates a greater volume to supply the desired number of moles to react with the analyte.

Step-by-step explanation:

When using a lower concentration of a titrant in a titration, the amount of titrant needed increases. This is because the titrant is less concentrated and therefore has fewer reacting molecules per unit volume. In a titration, the objective is to reach the equivalence point where the moles of titrant added react exactly with the moles of analyte present. If the concentration of the titrant is lower, it will take a greater volume to supply the same number of moles required to reach the equivalence point.

The correct answer to the original question is: The amount of titrant needed increases because it's less concentrated, which corresponds to option A.