Question

When an unknown weak acid is titrated with NaOH, how would your half-equivalence and volume of NaOH change if i) the concentration of acid was increased, ii) the acid had a larger Ka or iii) the NaOH concentration used as the titrant was increased?

Answer 1

1) if concentration of weak acid is increased that means more amount of NaOH now will be required to reach the half equivalence point because acid now becomes more concentrated.

2) If the acid has larger Ka that means higher dissociation constant then H+ will be given out easily and hence volume required to reach half equivalence point will be less and half equivalence point will come early.

3) if NaOH used is highly concentrated then also less NaOH will be required for the titration and half equivalence point will come at EARLY.