Question

During the titration, you added (neutral) DI water from the squirt bottle to wash the acid from the walls of the beaker. Explain whether or not this added water will affect the moles of acid needed to reach the stoichiometric point. How is the calculated Ksp affected?

Answer 1

The addition of water can't change the number of mols of acid. Because number of mols only depends on the mass of the substance but not on the volume. Hence there is no change in the moles by addition of water.

Ksp is effected as the addition of water changes the concentration (mol/L)

For a given reaction -

A(aq) + B( aq) <----------> AB (s)

Ksp = [A⁺][B^-]

Although , Ksp depends on the concentrations there is no change the final value of Ksp as it is a constant,