Question

2. Write reaction equations to explain how your acetic acid-acetate buffer reacts with an acid and reacts with a base. 3. Identify the Pka of acetic acid from your data. Advanced Chemistry with Vernier Buffers 4. Buffer capacity is usually defined as the pKa Il pH unit- that is, the pH range over which the ratios of protonated to unprotonated form of the buffer go from 10:1 to 1:10. Use your data to determine the buffer capacity of your buffer solution. 5. Say, for example, that you had prepared a Buffer X, in which you mixed 8.203 g of sodium acetate, NaC,H,O, with 100.0 mL of 10 M acetic acid. What would be the initial pH of Buffer X? 6. Provide the following 2 graphs of the titrations in the report 1. A graph showing the titrations of the acetic acid and the buffer with NaOH 2. Indicate in each instance the equivalence points and pka's of all your buffers.

Answer 1

(2) Acetic acid & sodium hydroxide sodium acetate & water оту соон + NaOH H ңооза + Но when Macon and CHaona are present en a solution, solution is andre buffer CH₃COOH + CHRUDNG Į Nagi (base added) CH wina (amount of CH3 CoNa increases],pH increases CH₂ WH + H₂ CWNA JHER (added acid) slightly CH3 WH + CH3 ewn amount q ctly own increases) pn decreases slightly when small amount of and ar base is added to buffer, it resiste a change in its pH.