What mass of ammonium chloride must be added to 250. mL of water to give a solution with pH = 4.85? [K_b(NH₃) = 1.8 * 10^-5] A) 4.7 g B) 75 g C) 2.3 * 10^-3 g D) 19 g E) 10. g

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Quizplus · Accepted Answer

To find the mass of NH4Cl needed, first calculate the concentration of NH4+ required to achieve the desired pH using the formula pH = 14 - pOH and the Kb value. Then, convert this concentration to mass using the molar mass of NH4Cl.

What Mass of Ammonium Chloride Must Be Added to 250