Question

How to solve problems with titration involving acids and bases ?

Answer 1

First:

identify if this is a strong/weak acid or base...

if this is strong acid and base, then, there are 4 steps:

initially --> only H+ acid is present, pH <7

then --> OH- neutralizes H+ slightly , pH does not changes that much ,  pH <7

3rd step --> neutralization OH- = H+, pH = 7

finally --> excess OH- , the pH > 7

If this is weak acid /strong base:

- initialyl pH is acidic

- adding strong base forms Buffer! so pH changes little compared to previous exercse

- in equivalence point, there is hydrolysis of acid A- + H2O <--> HA + OH-, pH > 7

- after equivalence point, there is excess base, so pH >> 7