Lab 7

Question 1

Buffer

Answer 1

Solution that contains a conjugate acid-base pair and resists drastic changes in pH upon the addition of small amounts of acid or base
Made mixing weak acid/base with salt of its conjugate base/acid, or by mixing weak acid/base with strong base/acid

Question 2

Henderson-Hasselbalch equation

Answer 2

Rearrangement of the equilibrium expression for weak acids
pH = pKa + log( [A-]/[HA] )
A- = salt form
HA = acid

Question 3

Buffer Capacity

Answer 3

Buffer solution is the amount of acid or base the buffer can neutralize before the pH begins to change by an significant amount

Question 4

Purpose

Answer 4

To prepare buffer solutions and observe and compare their resistance to changes in pH