Acids + Bases Flashcards
What is the value of Kw?
1.0 * 10^-14
What is the equation for Kw?
Kw = [OH][H] Kw = Ka * Kb
The weaker the base, how is the Kb?
Small
What is the equation of Ka (acid dissociation constant)?
[H+][A-] / [HA]
What is the equation of Kb?
[B+][OH-] / [BOH]
A strong acid and strong base produces?
Salt + H2O
A strong acid and weak base produces?
A salt
The equivalence point is reached when
The acid equivalent = base equivalent
What are indicators?
Weak organic acids or bases
In what concentrations are indicators used?
Low concentrations
Indicators change colors at the
End point
A buffer solution consists of
Equal concetrations
What are combinations of buffer solutions?
- Weak acid + salt
- Weak base + salt
What is the Henderson-Hasselbalch used for?
To estimate the pH of solution in a buffer region where the species + conjugate are in equal concetrations
What is the Henderson-Hasselbalch equation?
pH = pKa + log [CB]/[WA]
