To calculate the pH at the equivalence point for various

Last updated: 5/1/2023

To calculate the pH at the equivalence point for various types of titrations The equivalence point in an acid base titration is the point at which stoichiometrically equivalent quantities of acid and base have been mixed together At this point the reaction is complete because all analyte has been consumed by titrant On a titration curve the equivalence point is represented by the point of inflection where the curve changes concavity The figure Figure 1 shows the titration of 40 0 mL of 0 100 M HCl with 0 100 M NaOH When 40 0 mL of the NaOH solution is added the acid base neutralization reaction is complete When analyzing titrations involving weak acids or bases consider how the neutralization reaction will impact the pH of the system For example when titrating a weak acid with a strong base at the equivalence point all the base has been used to neutralize the acid forming conjugate weak base Figure Hd 14 12 10 8 6 4 1 of 1 Equivalence point Part B A 80 0 mL volume of 0 25 M HBr is titrated with 0 50 M KOH Calculate the pH after addition of 40 0 mL of KOH at 25 C Express the pH numerically View Available Hint s pH Submit Part C V A O B VAE Review I Constants I Periodic Table Consider the titration of 50 0 mL of 0 20 M NH3 Kb 1 8 x 10 5 with 0 20 M HNO3 Calculate the pH after addition of 50 0 mL of the titrant at 25 C Express the pH numerically View Available Hint s