KD3203 2021-1-4 09:51
V1. The pH falls slow, and then it drops fast
When equivalence point is finally reached
This point can be deduced by an indicator
Which changes colour at a pH close to its value.
Chorus: In pH curve when pH falls smallest amount
Large concentration both acid, conjugate base
Removes excess solution by dissociation when
Small volume of acid, base added, it’s buffer
V2. When you need to find the pH of buffer
Find molarities by molar mass or volume
H+ is Ka times acid divided by salt
Use pH formula to find this buffer pH
V3. Or use total volume and molarity
To work out concentration of acid and salt
pKa plus log acid by salt, you get the pH
This is the Henderson-Hasselbach equation