You are asked to prepare a buffer for an experiment. You have access to the following dolutions of acid/base pairs: 1. Propanic Acid (CH3CH2COOH) / Sodium Propanoate (NaCH3CH2COO) with Ka = 1.4 x 10^-5 2. Potassium Hydrogensulfite (KHSO3) / Potassium Sulfite (K2SO3) with Ka = 6.2 x 10^-8 3. Chloroacetic acid (CH2ClCOOH) / Sodium Chlocoacetate (NaCH2ClCOOO) with Ka = 1.4 x 10^-2 Your buffer needs to be at a pH of 4.5. Which acid/base pair do you choose and why? Be very specific!

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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.