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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 larger the Kb, the stronger the base and the higher the OH − concentration at equilibrium. The values of Kb for a number of common weak bases are given in Table 16.5.2.

Multiply the Kb value by the total ammonia concentration and the number 4. The total concentration is the sum of [NH4+] and [NH3] in the solution. This concentration must be。

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