Ionization Constant of a Weak Acid - Monday 27, 2017...

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Monday 27, 2017 Makheni Jean-PierreLab Partner: Munassar AhmedIonization Constant of a Weak AcidObjective: To determine the equilibrium constant, Ka, of an unknown weak acid.Theory: According to Bronsted-Lowry definition, acids can donate proton written H+, or H3O+ in its hydrated form. There is another substance ,a base, that accpets or combine with the proton. When acid are mixed with water two reactions can occur because it depends the strength of the acid. In the case of a strong acid, 100% if the acid will ionize. For example considering the following reaction Hydrochloridric acid, strong, plus water: HCl(aq) + H2O H3O++ Cl-. An interpretation of the reaction is that since the HCl donates hydronium ion and H2O accepts the Hydronium, it means that this is a typic reaction of a strong acid and a base according to Bronsted-Lowry's definition. When weak acids are mixed with water, like acetic, it will not completely ionize to form hydronium ions; only a few will be made. For instance, the

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