Acid /Base equations

Acid and Base Equations

[H^+]   to  pH     = log (1/[H⁺])

pH to [H⁺]        =  10^-pH

kw = 1 x10^-14 at 25⁰C

[OH^-] to pOH   = log (1/[OH^-])

pOH to [OH^-]   = 10^-pOH

At 25⁰C  pH + pOH = 14

Ka = [H⁺] [A_-]/[HA]

Kb = [BH⁺] [OH^-]/[B]

Ka to pKa     = log (1/Ka)

pKa to Ka     = 10^-pKa

Kb to pKb    = log (1/Kb)

pKb to Kb     = 10^-kb

Ka x Kb = 1 x 10^-14   at 25^OC

PKa + pKb = 14 at 25^OC

pH of an acidic buffer =   PKa + log [salt]/[acid]

pOH of a basic buffer = pKb + log [salt]/[base]