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As an acid, a polyprotic acids have a very small acid dissociation constant (\(K_a\)), which measures the strength of the acid. K a corresponds to the reaction of a weak acid with water and can be used to determine the pH of a solution.
- Polyprotic Acids
An acid that contains more than one ionizable proton is a...
- Polyprotic Acids
Step 1. H 3 PO 4 H 2 PO 4– + H +. Step 2. H 2 PO 4– HPO 42– + H +. Step 3. HPO 4– PO 43– + H +. Titrations of polyprotic acids have more than one equivalence point due to the series of ionization steps. If H 3 PO 4 is titrated against a strong base such as NaOH. At each equivalence point, the acid is neutralised to H 2 PO 4, HPO 42 ...
D30.2 Titration of Polyprotic Acids and Bases. When a polyprotic acid is titrated, there are usually multiple equivalence points. For example, when H 2 SO 3 is titrated with NaOH, there are two equivalence points corresponding to the two acidic protons from the H 2 SO 3 molecule.
30 sty 2023 · Titrations. In strong acid + strong base titrations, the pH changes slowly at first, rapidly through the equivalence point of pH=7, and then slows down again. If it is being titrated in a strong acid, the pH will go up as the base is added to it. Conversely, if it is in a strong base, the pH will fall down as acid is added.
Titration of Polyprotic Acids. The shape of the titration curve for a polyprotic acid reflects the successive neutralization of the two or more ionizable hydrogen atoms in its formula.
Learn Polyprotic Titrations with free step-by-step video explanations and practice problems by experienced tutors.
An acid that contains more than one ionizable proton is a polyprotic acid. The protons of these acids ionize in steps. The differences in the acid ionization constants for the successive ionizations of the protons in a polyprotic acid usually vary by roughly five orders of magnitude.
