Acids & Bases - Chemistry
Acids & Bases - Chemistry
Acids & Bases - Chemistry
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Weak <strong>Bases</strong><strong>Acids</strong> & <strong>Bases</strong> 36These are bases that only react to a relatively smallextent with H + in solution::NH 3 (aq) + H + (aq) NH + 4 (aq)The convention, however, for writing equilibria forweak bases is to react the base with water, whichgenerates a small quantity of OH-::NH 3 (aq) + H 2 O NH + 4 (aq) + OH − (aq)This is the equilibrium we use to define our baseequilibrium constant, K b :[ NH+ −4 ][ OH ]− 5Kb= = 1.8×10[ NH]3In this equilibrium NH + 4 (aq) is called theconjugate acid (it acts like a weak acid).
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