Test: Conductometry & Conductometric Titrations - Chemistry MCQ

Conductometric titration is based on the principle that the ionic conductivity of a solution changes as different ions are introduced through the titration process. Conductivity is related to the number of free ions in the solution, and this number changes as the titrant is added. Therefore, the correct answer is option C.

Conductometric titration is particularly effective for titrating strong acids with strong bases, where the change in conductivity is sharp and easily detectable. While it can be used in other types of titrations, it is most commonly associated with acid-base titrations.

Conductometric titration is suitable for weak acids because they exhibit a sharp change in conductivity near the equivalence point. This sharp change allows for accurate and precise determination of the endpoint in the titration.

The formula for calculating the strength of an acid in a conductometric titration is S2 = (V1S1)/10, where S2 is the strength of the acid, V1 is the volume of base added at the equivalence point, S1 is the strength of the base, and 10 is a constant factor.

The main disadvantage of conductometric titration when the concentrations of the electrolyte are high is that the accuracy of the titration decreases. High concentrations can mask the conductivity change, making it challenging to precisely determine the endpoint.

Conductometric titration can be used for colored or turbid solutions when normal chemical indicators are not effective in detecting the endpoint. The change in conductivity serves as a reliable indicator in such cases.

The primary factor responsible for the change in conductivity during a conductometric titration is alterations in ionic concentration. As different ions are introduced or neutralized during the titration, the conductivity of the solution changes accordingly.

Conductometric titration is particularly useful for titrations of homogeneous suspensions because it can effectively detect the endpoint in solutions that are turbid or cloudy, where traditional color indicators may not work accurately.

A sharp increase in conductance during a conductometric titration indicates that the equivalence point has been reached. At this point, the concentration of ionic entities in the solution increases rapidly, leading to a significant change in conductivity.

When a base is added to a strong acid before reaching the equivalence point in a conductometric titration, the concentration of hydrogen ions (H+) decreases as they are neutralized by the base. This results in an increase in conductivity, as the solution becomes less acidic.