Equilibrium
pH scale and Common ion effect
pH scale :
p^H = -log[H^{+}] = log\frac{1}{[H^{+}]}
pOH = −log[OH−]
pka = −logka
pkb = −logkb
pkw = −logkw
pkw = 14
pH calculation for mixture of two strong acids :
[H^{+}] = \frac{N_{1}V_{1} + N_{2}V_{2}}{V_{1} + V_{2}}
pH = −log[H+]
[OH^{-}] = \frac{N_{1}V_{1} + N_{2}V_{2}}{V_{1} + V_{2}}
pOH = −log[OH−]
Relation between change in pH and no. of times of dilution [n] :
ΔpH = log n
ex : 2.3010 to 4
ΔpH = log n ⇒ (4 − 2.3010) = log n
log n = 1.6990
n = 50
Part1: View the Topic in this Video from 0:10 to 13:03
Part2: View the Topic in this Video from 0:10 to 12:00
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1. pH = −log[H+] and [H+] = 10−pH
2. pOH = −log[OH−]
3. pH = 14 − pOH