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What mass of ammonium chloride must be added to 250 mL of water to give a solution with pH = 4.85? [K(NH3) = 1.8x 10-51

What mass of ammonium chloride must be added to 250 mL of water to give a solution with pH = 4.85? [K(NH3) = 1.8x 10-51 9.8g 2.39 9.6g 7.09g 4.79

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