Which of the following acid-base systems is NOT suitable to prepare a buffer with a pH 7.4? MTS Tris (tris(hydroxymethyl)aminomethane): pK₁ = 8.0 Phosphate: pKal = 2.16 pKa2 = 7.21 pK₁3 = 12.32 Leucine: pKal= 2.328, pKa2=9.744 HEPES (4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid): pKal = 3.0, pka2 = 7.5

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A: pH scale measures the concentration of H+ ion and here H3O+ is the source of H+ ion.

Q: I was told that answer is incorrect. Is there another possible solution?

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Q: A chemist titrates 140.0 mL of a 0.1432M butanoic acid (HC3H,CO₂) solution with 0.5600M KOH solution…

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.