The purpose of my research was to determine the mass fraction of a potassium hydrogen tartrate in three samples of cream of tartar by three different titrations. I completed titrations of filtered and unfiltered solutions of samples with NaOH(aq) and with retitrations of added NaOH(aq) in the same solutions with HCl(aq). I also did titrations of samples diluted in deionized water with NaOH(aq). I used an automatic potentiometric titrator with a combined glass electrode. My results showed high mass fractions of KHT, which is expected, as KHT is the main component of cream of tartar. The cream of tartar of red wines may contain a large number of yeast cells, which results in lower mass fraction of KHT. I observed that results obtained by titration and retitration of filtered and unfiltered solutions of cream of tartar were considerably different, which could be the aftereffect of presence of other compounds that react with HCl(aq) and NaOH(aq).For a better understanding of said reactions, I would have to perform further analysis of cream of tartar to determine which compounds are actually present.