Lab 7 Flashcards
1
Q
Buffer
A
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
2
Q
Henderson-Hasselbalch equation
A
Rearrangement of the equilibrium expression for weak acids
pH = pKa + log( [A-]/[HA] )
A- = salt form
HA = acid
3
Q
Buffer Capacity
A
Buffer solution is the amount of acid or base the buffer can neutralize before the pH begins to change by an significant amount
4
Q
Purpose
A
To prepare buffer solutions and observe and compare their resistance to changes in pH
