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, we first calculate the concentration of H+ ions using the pH. Then, using the Kb of NH3, we find the concentration of NH4+ needed to achieve this pH. Finally, we convert this concentration to mass using the molar mass of NH4Cl.

What Mass of Ammonium Chloride Must Be Added to 250