How will the dielectric constant of water change when ethyl acetate is added?


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> How will the dielectric constant of water change when ethyl acetate is added?
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The $\mathrm{p}K\_a$ value of weak acids in aprotic solvents will be lower than in protic solvents because the dielectric constant does not favor ionization. If I increase the $\mathrm{\text{%}}$ concentration of ethyl acetate in water and gradually increase it to nearly $\mathrm{100\text{%}}$ ethyl acetate, how will the $\mathrm{p}K\_a$ values of a weak acid in this solvent change?


I want to determine the endpoint with an indicator dye and a suitable titrant of a strong base such as sodium hydroxide. My general aim is to calculate pKa in an easier way. 


