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Find the relative strength of acids and bases using this chart that includes the K a value for reference. The chart lists ammonia (NH3) as a weak base with a K a value of 5.8 * 10 -10.

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-).

Aqueous ammonia (NH3) is a weak basic solution. pH of NH3 solution is calculated by using Kb value of NH3. Online calculator can be used to check your pH values.

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