To determine the Ka (acid dissociation constant) of KHP (potassium hydrogen phthalate) based on the amount used in a titration experiment, additional information is needed. The Ka value cannot be directly calculated from the mass of KHP alone.
The Ka value is determined through acid-base titration experiments and subsequent calculations involving the volumes of titrant and analyte used. Typically, a standard solution of a strong base, such as sodium hydroxide (NaOH), is titrated against a known concentration of KHP solution until the equivalence point is reached.
To calculate the Ka value, you would need the volume and concentration of the NaOH solution used during the titration, as well as the volume of the KHP solution.
If you provide the additional information, such as the volume and concentration of the NaOH solution used and the volume of the KHP solution, I can help you calculate the Ka value.