8_Ch17_AqEquilibria_1

# 1m ch3coona add hcl add naoh how does the addion

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Unformatted text preview: stances that keep its pH fixed at 7.3 - important for life funcDons Buffer soluDons consist of either: buffers and <tra<ons 5 Buffers If a small amount of hydroxide is added to an equimolar solu<on of HF in NaF, the HF reacts with the OH- to make F- and water. Similarly, if acid is added, the F- reacts with it to form HF and water. buffers and <tra<ons 6 Quan<ta<vely Calculate the pH of a solu<on that is 0.1M CH3COOH and 0.1M CH3COONa Buffer Calcula<ons Consider the equilibrium constant expression for the dissocia<on of a generic acid, HA: HA(aq) H+(aq) + A-(aq) This is the HendersonHasselbalch equa<on. buffers and <tra<ons 8 pH of Buffer Calculate the pH of a soluDon that is 0.1M NH3 and 0.2M NH4Cl. buffers and <tra<ons 9 Example: What is the pH of a buffer that is 0.12 M in lac<c acid, CH3CH (OH)COOH, and 0.10 M in sodium lactate? Ka for lac<c acid is 1.4 10-4. buffers and <tra<ons 10 When Strong Acids or Bases Are Added to a Buffer... Addi<on of Strong Acid or Base to a Buffer 1. Determine how the...
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