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The Kb is the equilibrium constant for the reaction of the base ammonia combining with water to produce ammonium, the conjugate acid, and a hydroxide anion (OH-).

NH3 has a Kb of 1.8x10^-5. What is the pH of a 1.5 M solution of NH3? Given that Kb = 6.3x10^-5, find the concentration of the hydroxide anion in a 0.25 M solution of (CH3)3N.

The following equation describes the reaction between ammonia and water:

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