PH of strong bases, strong acids, weak acids and water Flashcards
1
Q
What is the equation for PH?
A
PH = -log(H+)
2
Q
What is the equation to determine H+?
A
H+ = 10-PH
3
Q
How do you determine the PH of a strong acid?
A
- monobasic acids have the same concentration as their H+ ions, this means that (HA) = (H+) as they fully dissociate
4
Q
How do you find the PH of a strong acid on dilution?
A
H+ in original x old volume/new volume
5
Q
What is the kw expression of water?
A
Kw = (H+)(OH-)
6
Q
What is the kw expression of pure water?
A
Kw = (H+)2
7
Q
What is the kw of water at 298K?
A
1.00 x 10-14
PH = 7
8
Q
How do you find the PH of strong bases?
A
- find the concentration of H+ ions
- rearrange the kw expression to find the concentration of OH-
