(1) Find the Ka and H+ from pKa and pH
Ka = 10-pKa = 10-9.26 = 5.50x10-10
(2) Set up ICE table and find initial NH4+ where x = 0.0001
(3) Find y where x = 0.0001.
Ammonium (NH4+) is a weak acid with a pK a of 9.26. The dissociation is:
NH4+ ⇌ NH3 + H+
Calculate the mass of ammonium added to 1 L of water in order to obtain a pH of 4 at equilibrium.
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